It is usually warm in my hometown in March but it be rather cold sometimes.A. mustB. can

问题补充：

It is usually warm in my hometown in March, but it be rather cold sometimes.

A. must

B. can

C. should

D. would

答案：

A. must

(答案→)B. can

C. should

D. would

解析：考查情态动词的用法。从but，sometimes来推测，句子应选择能表示“可能”的情态动词can。