单项选择题

() challenges in Chinas car－sharing economy, shared mobility still has a promising future.

A.Despite
B.Besides
C.Concerning
D.Regarding

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地带性单位与非地带性单位都是不完全的综合单位。( )

答案：正确

单项选择题

－Should I ask the boss if he's upset at my coming in late in the mornings? －If he hasn't t said anything about it, just.

A.let
B.strike
C.put
D.kill