题目
-Mum, why do I have to wash hands so many times a day?
-For your health, you______be too careful.( )
-For your health, you______be too careful.( )
A.
can\’t
B.
shouldn\’t
C.
mustn\’t
D.
needn\’t
知识点:情态动词;虚拟语气章节:未标注
答案与解析
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