英语中 表示猜测时可以用should shouldn't吗There is no light on,they__be at home.A.can't B.mustn't C.needn't D.shouldn't

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英语中 表示猜测时可以用should shouldn't吗There is no light on,they__be at home.A.can't B.mustn't C.needn't D.shouldn't
英语中 表示猜测时可以用should shouldn't吗
There is no light on,they__be at home.
A.can't B.mustn't C.needn't D.shouldn't

英语中 表示猜测时可以用should shouldn't吗There is no light on,they__be at home.A.can't B.mustn't C.needn't D.shouldn't
不能,should shouldn't表示应不应该
表示肯定推测用must
表示否定用can't

同上

不能
否定猜测用can't 肯定用must
所以选a