单选题The flowers _____ often.Amust be waterBmust be wateredCmust wateredDmust water

单选题
The flowers _____ often.
A

must be water

B

must be watered

C

must watered

D

must water


参考解析

解析:
句意:需要经常浇花。此处考查情态动词后接被动式(must+be done),故选B。

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