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_____Listen!Helen is singing in the next room.___It ____be Helen.She has gone to Beijing.A.can'tB.mustn't
题目详情
_____Listen!Helen is singing in the next room.
___It ____be Helen.She has gone to Beijing.
A.can't
B.mustn't
___It ____be Helen.She has gone to Beijing.
A.can't
B.mustn't
▼优质解答
答案和解析
海伦去北京了.不可能是她.
-----说话者对此很确定.所以用B
-----说话者对此很确定.所以用B
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