---Who________itbethatisknockingatthedoor?---It________beFather,butI’m

发布时间:2020-08-04 15:46:12

---Who________ it be that is knocking at the door?---It ________ be Father, butI’m not sure.A.can; mayB.must; canC.may; mustD.need; should

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A解析问句表可能性的用can,答句无根据的推测用may。
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