【題目】Hurry up! Tom _______ for us at the gate.

A.must waitB.must be waiting

C.can be waitingD.must have waited

【答案】B

【解析】

考查情態(tài)動詞和時態(tài)。句意:快點!湯姆一定在大門口等我們。本句是一個推測題,是對現(xiàn)在有把握的肯定推測,所以用情態(tài)動詞 must。根據(jù)語境可知此時湯姆正在等,所以用 must be waiting。故選B。

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