( )that sign mean"No smoking"?No,it means"Danger".A.Is B.Does C.Do D.Are.

问题描述:

( )that sign mean"No smoking"?No,it means"Danger".A.Is B.Does C.Do D.Are.

答案 是A

选B
mean是实意动词,疑问句要用助动词do来提问;
that sign是单三,所以do要变成单三形式does.
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