166. Kunming is said to be a city of spring all the year round. But the weather there unp

问题补充：

166. Kunming is said to be a city of spring all the year round. But the weather there unpleasant.

A. should be

B. may be

C. must

D. can be

答案：

A. should be

B. may be

C. must

D. can be

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