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It’s quite warm here; we __________turn the heating on yet.
A.couldn’t B.mustn’tC.needn’tD.wouldn’t
C
考查情态动词。couldn’t不能;mustn’t禁止;needn’t不必;wouldn’t不会。
根据上文“这里相当暖和”可以推知下文应该是:我们没必要开暖气。故选C。
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