34. The space is left to let the rail expand when it gets hot, ?A. isn’t itB. is itC. does

发布时间：2020-08-16 06:13:56


34. The space is left to let the rail expand when it gets hot,     ?
A. isn’t it
B. is it
C. doesn’t it
D. does it

网友回答

(答案→)A. isn’t it
B. is it
C. doesn’t it
D. does it
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