题目内容
---Someone’s been here. Who ___ it be? It looks like Helen.
---It ___ be Helen.She is ill in hospital.
A. must; must B. might; could C. can; mustn’t D. can; can’t
D
解析:
can 常用于表示否定和问句的推测。
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题目内容
---Someone’s been here. Who ___ it be? It looks like Helen.
---It ___ be Helen.She is ill in hospital.
A. must; must B. might; could C. can; mustn’t D. can; can’t
D
can 常用于表示否定和问句的推测。