--It ____ Jack who is at the gate of the library.
--It ____ him. I saw him off at the railway station just an hour ago.A.can be; can't beB.must be; can't beC.can be; must have beenD.must be; can't have been
--It____Jackwhoisatthegateofthelibrary.--It____him.Isawhimoffatt
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解决时间 2021-01-04 00:42
- 提问者网友：萌卜娃娃
- 2021-01-03 12:54
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- 五星知识达人网友：天凉才是好个秋
- 2021-01-03 14:33
B解析must用于表示肯定推断，意为“想必”“一定”，表示否定推断，不可能时却不用mustn't，而用can't。本题两处空白都是对现在情况的推断，故用不定式一般式。
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- 1楼网友：狂恋
- 2021-01-03 15:34
好好学习下
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