You would have to extract the items into a new list and remove the empty cells.
Sheet1
<TABLE style="PADDING-RIGHT: 2pt; PADDING-LEFT: 2pt; FONT-SIZE: 10pt; FONT-FAMILY: Verdana,Arial; BACKGROUND-COLOR: #ffffff" cellSpacing=0 cellPadding=0 border=0><COLGROUP><COL style="FONT-WEIGHT: bold; WIDTH: 30px"><COL style="WIDTH: 51px"><COL style="WIDTH: 51px"></COLGROUP><TBODY><TR style="FONT-WEIGHT: bold; FONT-SIZE: 8pt; BACKGROUND-COLOR: #cacaca; TEXT-ALIGN: center"><TD></TD><TD>D</TD><TD>E</TD></TR><TR style="HEIGHT: 17px"><TD style="FONT-SIZE: 8pt; BACKGROUND-COLOR: #cacaca; TEXT-ALIGN: center">7</TD><TD style="BORDER-RIGHT: #000000 1px solid; BORDER-TOP: #000000 1px solid; BORDER-LEFT: #000000 1px solid; BORDER-BOTTOM: #000000 1px solid">Item1</TD><TD style="BORDER-RIGHT: #000000 1px solid; BORDER-TOP: #000000 1px solid; BORDER-LEFT-WIDTH: 1px; BORDER-LEFT-COLOR: #000000; BORDER-BOTTOM: #000000 1px solid">Item1</TD></TR><TR style="HEIGHT: 17px"><TD style="FONT-SIZE: 8pt; BACKGROUND-COLOR: #cacaca; TEXT-ALIGN: center">8</TD><TD style="BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: #000000 1px solid; BORDER-LEFT: #000000 1px solid; COLOR: #ffffff; BORDER-TOP-COLOR: #000000; BORDER-BOTTOM: #000000 1px solid">_</TD><TD style="BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: #000000 1px solid; BORDER-LEFT-WIDTH: 1px; BORDER-LEFT-COLOR: #000000; BORDER-TOP-COLOR: #000000; BORDER-BOTTOM: #000000 1px solid">Item2</TD></TR><TR style="HEIGHT: 17px"><TD style="FONT-SIZE: 8pt; BACKGROUND-COLOR: #cacaca; TEXT-ALIGN: center">9</TD><TD style="BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: #000000 1px solid; BORDER-LEFT: #000000 1px solid; COLOR: #ffffff; BORDER-TOP-COLOR: #000000; BORDER-BOTTOM: #000000 1px solid">_</TD><TD style="BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: #000000 1px solid; BORDER-LEFT-WIDTH: 1px; BORDER-LEFT-COLOR: #000000; BORDER-TOP-COLOR: #000000; BORDER-BOTTOM: #000000 1px solid">Item3</TD></TR><TR style="HEIGHT: 17px"><TD style="FONT-SIZE: 8pt; BACKGROUND-COLOR: #cacaca; TEXT-ALIGN: center">10</TD><TD style="BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: #000000 1px solid; BORDER-LEFT: #000000 1px solid; BORDER-TOP-COLOR: #000000; BORDER-BOTTOM: #000000 1px solid">Item2</TD><TD style="BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: #000000 1px solid; BORDER-LEFT-WIDTH: 1px; BORDER-LEFT-COLOR: #000000; BORDER-TOP-COLOR: #000000; BORDER-BOTTOM: #000000 1px solid">Item4</TD></TR><TR style="HEIGHT: 17px"><TD style="FONT-SIZE: 8pt; BACKGROUND-COLOR: #cacaca; TEXT-ALIGN: center">11</TD><TD style="BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: #000000 1px solid; BORDER-LEFT: #000000 1px solid; BORDER-TOP-COLOR: #000000; BORDER-BOTTOM: #000000 1px solid">Item3</TD><TD style="BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: #000000 1px solid; BORDER-LEFT-WIDTH: 1px; BORDER-LEFT-COLOR: #000000; BORDER-TOP-COLOR: #000000; BORDER-BOTTOM: #000000 1px solid">Item5</TD></TR><TR style="HEIGHT: 17px"><TD style="FONT-SIZE: 8pt; BACKGROUND-COLOR: #cacaca; TEXT-ALIGN: center">12</TD><TD style="BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: #000000 1px solid; BORDER-LEFT: #000000 1px solid; BORDER-TOP-COLOR: #000000; BORDER-BOTTOM: #000000 1px solid">Item4</TD><TD style="BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: #000000 1px solid; BORDER-LEFT-WIDTH: 1px; BORDER-LEFT-COLOR: #000000; BORDER-TOP-COLOR: #000000; BORDER-BOTTOM: #000000 1px solid">Item6</TD></TR><TR style="HEIGHT: 17px"><TD style="FONT-SIZE: 8pt; BACKGROUND-COLOR: #cacaca; TEXT-ALIGN: center">13</TD><TD style="BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: #000000 1px solid; BORDER-LEFT: #000000 1px solid; COLOR: #ffffff; BORDER-TOP-COLOR: #000000; BORDER-BOTTOM: #000000 1px solid">_</TD><TD style="BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: #000000 1px solid; BORDER-LEFT-WIDTH: 1px; BORDER-LEFT-COLOR: #000000; BORDER-TOP-COLOR: #000000; BORDER-BOTTOM: #000000 1px solid">Item7</TD></TR><TR style="HEIGHT: 17px"><TD style="FONT-SIZE: 8pt; BACKGROUND-COLOR: #cacaca; TEXT-ALIGN: center">14</TD><TD style="BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: #000000 1px solid; BORDER-LEFT: #000000 1px solid; BORDER-TOP-COLOR: #000000; BORDER-BOTTOM: #000000 1px solid">Item5</TD><TD style="BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: #000000 1px solid; BORDER-LEFT-WIDTH: 1px; BORDER-LEFT-COLOR: #000000; BORDER-TOP-COLOR: #000000; BORDER-BOTTOM: #000000 1px solid">Item8</TD></TR><TR style="HEIGHT: 17px"><TD style="FONT-SIZE: 8pt; BACKGROUND-COLOR: #cacaca; TEXT-ALIGN: center">15</TD><TD style="BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: #000000 1px solid; BORDER-LEFT: #000000 1px solid; COLOR: #ffffff; BORDER-TOP-COLOR: #000000; BORDER-BOTTOM: #000000 1px solid">_</TD><TD style="BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: #000000 1px solid; BORDER-LEFT-WIDTH: 1px; BORDER-LEFT-COLOR: #000000; BORDER-TOP-COLOR: #000000; BORDER-BOTTOM: #000000 1px solid">Item9</TD></TR><TR style="HEIGHT: 17px"><TD style="FONT-SIZE: 8pt; BACKGROUND-COLOR: #cacaca; TEXT-ALIGN: center">16</TD><TD style="BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: #000000 1px solid; BORDER-LEFT: #000000 1px solid; COLOR: #ffffff; BORDER-TOP-COLOR: #000000; BORDER-BOTTOM: #000000 1px solid">_</TD><TD style="BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: #000000 1px solid; BORDER-LEFT-WIDTH: 1px; BORDER-LEFT-COLOR: #000000; BORDER-TOP-COLOR: #000000; BORDER-BOTTOM: #000000 1px solid">Item10</TD></TR><TR style="HEIGHT: 17px"><TD style="FONT-SIZE: 8pt; BACKGROUND-COLOR: #cacaca; TEXT-ALIGN: center">17</TD><TD style="BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: #000000 1px solid; BORDER-LEFT: #000000 1px solid; COLOR: #ffffff; BORDER-TOP-COLOR: #000000; BORDER-BOTTOM: #000000 1px solid">_</TD><TD style="BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: #000000 1px solid; BORDER-LEFT-WIDTH: 1px; BORDER-LEFT-COLOR: #000000; BORDER-TOP-COLOR: #000000; BORDER-BOTTOM: #000000 1px solid">Item11</TD></TR><TR style="HEIGHT: 17px"><TD style="FONT-SIZE: 8pt; BACKGROUND-COLOR: #cacaca; TEXT-ALIGN: center">18</TD><TD style="BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: #000000 1px solid; BORDER-LEFT: #000000 1px solid; BORDER-TOP-COLOR: #000000; BORDER-BOTTOM: #000000 1px solid">Item6</TD><TD style="BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: #000000 1px solid; BORDER-LEFT-WIDTH: 1px; BORDER-LEFT-COLOR: #000000; BORDER-TOP-COLOR: #000000; BORDER-BOTTOM: #000000 1px solid">Item12</TD></TR><TR style="HEIGHT: 17px"><TD style="FONT-SIZE: 8pt; BACKGROUND-COLOR: #cacaca; TEXT-ALIGN: center">19</TD><TD style="BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: #000000 1px solid; BORDER-LEFT: #000000 1px solid; BORDER-TOP-COLOR: #000000; BORDER-BOTTOM: #000000 1px solid">Item7</TD><TD style="BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: #000000 1px solid; BORDER-LEFT-WIDTH: 1px; BORDER-LEFT-COLOR: #000000; BORDER-TOP-COLOR: #000000; BORDER-BOTTOM: #000000 1px solid">Item13</TD></TR><TR style="HEIGHT: 17px"><TD style="FONT-SIZE: 8pt; BACKGROUND-COLOR: #cacaca; TEXT-ALIGN: center">20</TD><TD style="BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: #000000 1px solid; BORDER-LEFT: #000000 1px solid; BORDER-TOP-COLOR: #000000; BORDER-BOTTOM: #000000 1px solid">Item8</TD><TD style="BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: #000000 1px solid; BORDER-LEFT-WIDTH: 1px; BORDER-LEFT-COLOR: #000000; BORDER-TOP-COLOR: #000000; BORDER-BOTTOM: #000000 1px solid">Item14</TD></TR><TR style="HEIGHT: 17px"><TD style="FONT-SIZE: 8pt; BACKGROUND-COLOR: #cacaca; TEXT-ALIGN: center">21</TD><TD style="BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: #000000 1px solid; BORDER-LEFT: #000000 1px solid; COLOR: #ffffff; BORDER-TOP-COLOR: #000000; BORDER-BOTTOM: #000000 1px solid">_</TD><TD style="BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: #000000 1px solid; BORDER-LEFT-WIDTH: 1px; BORDER-LEFT-COLOR: #000000; COLOR: #ffffff; BORDER-TOP-COLOR: #000000; BORDER-BOTTOM: #000000 1px solid">_</TD></TR><TR style="HEIGHT: 17px"><TD style="FONT-SIZE: 8pt; BACKGROUND-COLOR: #cacaca; TEXT-ALIGN: center">22</TD><TD style="BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: #000000 1px solid; BORDER-LEFT: #000000 1px solid; COLOR: #ffffff; BORDER-TOP-COLOR: #000000; BORDER-BOTTOM: #000000 1px solid">_</TD><TD style="BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: #000000 1px solid; BORDER-LEFT-WIDTH: 1px; BORDER-LEFT-COLOR: #000000; COLOR: #ffffff; BORDER-TOP-COLOR: #000000; BORDER-BOTTOM: #000000 1px solid">_</TD></TR><TR style="HEIGHT: 17px"><TD style="FONT-SIZE: 8pt; BACKGROUND-COLOR: #cacaca; TEXT-ALIGN: center">23</TD><TD style="BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: #000000 1px solid; BORDER-LEFT: #000000 1px solid; BORDER-TOP-COLOR: #000000; BORDER-BOTTOM: #000000 1px solid">Item9</TD><TD style="BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: #000000 1px solid; BORDER-LEFT-WIDTH: 1px; BORDER-LEFT-COLOR: #000000; COLOR: #ffffff; BORDER-TOP-COLOR: #000000; BORDER-BOTTOM: #000000 1px solid">_</TD></TR><TR style="HEIGHT: 17px"><TD style="FONT-SIZE: 8pt; BACKGROUND-COLOR: #cacaca; TEXT-ALIGN: center">24</TD><TD style="BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: #000000 1px solid; BORDER-LEFT: #000000 1px solid; COLOR: #ffffff; BORDER-TOP-COLOR: #000000; BORDER-BOTTOM: #000000 1px solid">_</TD><TD style="BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: #000000 1px solid; BORDER-LEFT-WIDTH: 1px; BORDER-LEFT-COLOR: #000000; COLOR: #ffffff; BORDER-TOP-COLOR: #000000; BORDER-BOTTOM: #000000 1px solid">_</TD></TR><TR style="HEIGHT: 17px"><TD style="FONT-SIZE: 8pt; BACKGROUND-COLOR: #cacaca; TEXT-ALIGN: center">25</TD><TD style="BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: #000000 1px solid; BORDER-LEFT: #000000 1px solid; BORDER-TOP-COLOR: #000000; BORDER-BOTTOM: #000000 1px solid">Item10</TD><TD style="BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: #000000 1px solid; BORDER-LEFT-WIDTH: 1px; BORDER-LEFT-COLOR: #000000; COLOR: #ffffff; BORDER-TOP-COLOR: #000000; BORDER-BOTTOM: #000000 1px solid">_</TD></TR><TR style="HEIGHT: 17px"><TD style="FONT-SIZE: 8pt; BACKGROUND-COLOR: #cacaca; TEXT-ALIGN: center">26</TD><TD style="BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: #000000 1px solid; BORDER-LEFT: #000000 1px solid; BORDER-TOP-COLOR: #000000; BORDER-BOTTOM: #000000 1px solid">Item11</TD><TD style="BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: #000000 1px solid; BORDER-LEFT-WIDTH: 1px; BORDER-LEFT-COLOR: #000000; COLOR: #ffffff; BORDER-TOP-COLOR: #000000; BORDER-BOTTOM: #000000 1px solid">_</TD></TR><TR style="HEIGHT: 17px"><TD style="FONT-SIZE: 8pt; BACKGROUND-COLOR: #cacaca; TEXT-ALIGN: center">27</TD><TD style="BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: #000000 1px solid; BORDER-LEFT: #000000 1px solid; BORDER-TOP-COLOR: #000000; BORDER-BOTTOM: #000000 1px solid">Item12</TD><TD style="BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: #000000 1px solid; BORDER-LEFT-WIDTH: 1px; BORDER-LEFT-COLOR: #000000; COLOR: #ffffff; BORDER-TOP-COLOR: #000000; BORDER-BOTTOM: #000000 1px solid">_</TD></TR><TR style="HEIGHT: 17px"><TD style="FONT-SIZE: 8pt; BACKGROUND-COLOR: #cacaca; TEXT-ALIGN: center">28</TD><TD style="BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: #000000 1px solid; BORDER-LEFT: #000000 1px solid; BORDER-TOP-COLOR: #000000; BORDER-BOTTOM: #000000 1px solid">Item13</TD><TD style="BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: #000000 1px solid; BORDER-LEFT-WIDTH: 1px; BORDER-LEFT-COLOR: #000000; COLOR: #ffffff; BORDER-TOP-COLOR: #000000; BORDER-BOTTOM: #000000 1px solid">_</TD></TR><TR style="HEIGHT: 17px"><TD style="FONT-SIZE: 8pt; BACKGROUND-COLOR: #cacaca; TEXT-ALIGN: center">29</TD><TD style="BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: #000000 1px solid; BORDER-LEFT: #000000 1px solid; BORDER-TOP-COLOR: #000000; BORDER-BOTTOM: #000000 1px solid">Item14</TD><TD style="BORDER-TOP-WIDTH: 1px; BORDER-RIGHT: #000000 1px solid; BORDER-LEFT-WIDTH: 1px; BORDER-LEFT-COLOR: #000000; COLOR: #ffffff; BORDER-TOP-COLOR: #000000; BORDER-BOTTOM: #000000 1px solid">_</TD></TR></TBODY></TABLE>
Enter this array formula** in E7:
=IF(ROWS(E$7:E7)>COUNTA(D$7:D$29),"",INDEX(D:D,SMALL(IF(D$7:D$29<>"",ROW(D$7:D$29)),ROWS(E$7:E7))))
** array formulas need to be entered using the key
combination of CTRL,SHIFT,ENTER (not just ENTER).
Hold down both the CTRL key and the SHIFT key
then hit ENTER.
Copy down until you get blanks.
Then, as the source for your drop down list use:
=OFFSET(E7,,,COUNTIF(E7:E29,"?*"))