题目内容
-Can we run across the road now?
-No, we ________.We have to wait until the light turns green.
[ ]
A.needn't
B.mustn't
C.couldn't
D.shouldn't
答案:B
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题目内容
-Can we run across the road now?
-No, we ________.We have to wait until the light turns green.
A.needn't
B.mustn't
C.couldn't
D.shouldn't