It’s nearly 7 o’clock. Helen _______ come, but let’s wait for her for another 5 to 7 minutes.
A．couldn’tB．can’tC．mustn’tD．may not
D
考查情態(tài)動(dòng)詞。句意“將近7點(diǎn)了。海倫可能不會(huì)來(lái)了，但是讓我們?cè)俚人?-7分鐘吧�！盇“不可能”；B“不可能”；C“禁止”；D“可能不”，語(yǔ)氣沒(méi)有can’t強(qiáng)，根據(jù)句意可知，應(yīng)該表示不太肯定的語(yǔ)氣。故選D。
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