- It be Mr.Johnson who is in the office.- No, it be him.I saw him off at the air
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— It _______ be Mr.Johnson who is in the office.
— No, it _______ be him.I saw him off at the airport half an hour ago.
| A.can’t ; can’t | B.must; can’t | C.must; mustn’t | D.may; mustn’t |
试题答案
B
解析