【題目】It's quite warm here; we __________turn the heating on yet.
A.couldn't
B.mustn't
C.needn't
D.wouldn't

【答案】C
【解析】句意：這里相當暖和，我們沒有必要打開暖氣。A. couldn't"不能"；B.mustn't"禁止"；C.needn't"不必"；D.wouldn't"不會"。根據(jù)上文“這里相當暖和”可以推知下文應(yīng)該是：我們沒必要開暖氣。故選C。

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