It is usually cool in April in Chongqing, but it sometimes be rather hot for a few days.

发布时间：2020-08-16 09:56:16

It is usually cool in April in Chongqing, but it sometimes      be rather hot for a few days.
A. can
B. must
C. shall
D. ought to

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(答案→)A. can
B. must
C. shall
D. ought to
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