We must try our best to get good marks _____ we may win the first prize.
A. as
B. therefore
C. if
D. in order that
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It is a long time _____.
A. since I last saw you
B. ago I last saw you
C. when I last saw you
D. then I last saw you
_____ you won't be able to come, we have to put off the meeting.
A. Though
B. As soon as
C. Seeing that
D. Until
It was _____ everyone of us expressed our views.
A. so interesting a topic that
B. such interesting topic that
C. a interesting topic so that
D. a very interesting topic so that
It will be five years _____ we meet again.
A. since
B. until
C. before
D. when
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