选C
首先排除B
助动词后面动词原形
接着排除A、D
这句句子是单数.怎么可能用do呢
所以.只有选C
不懂追问
thinks
!
属于我的style为你解答
What()this()?-----It ()Be quiet.A.do;mean;meansB.does;means;
2个回答
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