题目内容

---Listen! Someone is knocking at the door. Who _____it be?
---It _____be Tom. He phoned to visit me this evening.
A．may; mayB．may; shouldn’tC．must; canD．can; may
D
考查情态动词用法。根据句意: ---听！有人正在敲门。可能会是谁了？----也许可能是Tom.他打过电话说今晚要拜访我。Can 表示可能性，故排除B和C。
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