单项选择题

We'll have to continue the discussion tomorrow______we can make a final decision today.

A．unless
B．because
C．when
D．since
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单项选择题
Hardly______at the office when the telephone rang.
A．I arrived
B．I had arrived
C．did I arrive
D．had I arrived
单项选择题
You'd better______advice before making a project plan.
A．put down
B．take in
C．turn out
D．ask for
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