q('<TABLE width="100%">');
q('<TR><TD ID="a16" TITLE="haven\'t eaten<P><EM>Today</EM> is an expression of unfinished time, so the present perfect is the correct tense here.<\/P>" width="5%"></TD><TD ID="def16" onClick="defClick(16);">I\'m very hungry. It\'s 11.30 and I  .......  anything yet today.</TD><TD align="right">~haven\'t eaten~didn\'t eat~am not eating~don\'t eat~</TD></TR>');
q('<TR><TD ID="a17" TITLE="Did you see<P><EM>Last night</EM> is an expression of finished time  so the past simple is correct.<\/P>" width="5%"></TD><TD ID="def17" onClick="defClick(17);">.......  the football match on TV last night?</TD><TD align="right">~Did you see~Have you seen~Were you seeing~Do you see~</TD></TR>');
q('<TR><TD ID="a18" TITLE="hasn\'t rained<P>The present perfect is the correct tense here for an event that has happened (or hasn\'t happened) in unfinished time. The word <EM>yet</EM> is another clue to the need to use the present perfect.<\/P>" width="5%"></TD><TD ID="def18" onClick="defClick(18);">Last week was very wet, but it  .......  once yet this week.</TD><TD align="right">~hasn\'t rained~didn\'t rain~isn\'t raining~haven\'t rained~</TD></TR>');
q('<TR><TD ID="a19" TITLE="I\'ve bought<P>The present perfect is the right tense here. There is a clear connection between the past event <EM>buying</EM> and the present.<\/P>" width="5%"></TD><TD ID="def19" onClick="defClick(19);">.......  a new computer. Do you want to see it?</TD><TD align="right">~I\'ve bought~I bought~I buy~I was buying~</TD></TR>');
q('<TR><TD ID="a20" TITLE="I\'ve lost<P>The speaker is clearly looking for the dictionary now, so the present perfect is used to express the connection between a past event and the present.<\/P>" width="5%"></TD><TD ID="def20" onClick="defClick(20);">.......  my dictionary. Have you seen it?</TD><TD align="right">~I\'ve lost~I lost~I lose~I\'m lost~</TD></TR>');
q('</TABLE>');