______we _______the work by next Friday,we won't be able to attend the meeting.
A. If ....shall finish
B. Unless.....finish
C. When...finish
D. Once...finish
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It wasn't long_______the girl came to ask again.
A. before
B. after
C. as
D. when
It was 10 o'clock______we arrived at the Beijing Railway Station.
A. when
B. that
C. which
D. then
In my opinion, they'll carry on the work ______they can get the money they need.
A. until
B. unless
C. whether
D. though
1.党和政府设立最高科学技术奖的理论依据是( )
A. 教育创新是科技创新的基础
B. 科学技术是第一生产力.
C. 科学技术是现阶段我国一切工作的中心
D. 我国的科技发展突飞猛进