The driver pulled_____at the traffic lights.
a.in
b.off
c.up
d.out
第1题
Your bike needs_____.You?d better do i right now.
a.clean
b.to be clean
c.being cleaned
d.to clean
第2题
_____you understand this rule,you?ll have no difficulty in dealing with such problems.
a.While
b.Though
c.Unless
d.Once
第4题
_____all the representatives still not there,the meeting was postponed for several hours.
a.Because
b.With
c.By
d.Without
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