【題目】I know that man. He be Helen’s father.

A. may B. need C. must D. can

【答案】C

【解析】句意：我認識那個人，他一定是海倫的父親。A. may可能，B. need需要；C. must必須，一定；D. can能夠。根據(jù)I know that man.判斷，用must表示肯定的推測，答案為C。

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