stop【C6】______motorists and help when there is an accident.
A. resting
B. tired
C. speeding
D. drunken
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either【C4】______foot in the centre of a town,
A. on
B. by
C. under
D. with
The main reason for the widespread【C8】______for English
A. require
B. request
C. supply
D. demand
who do not believe that the police【C2】______have the power that they do.
A. should
B. would
C. could
D. must
启闭机轨道安装时,两平行轨道接头的位置应()。
A. 对齐
B. 错开
C. 两者都可以