【題目】It's quite warm here; we ________ turn the heating on yet.

A.needn’t B.mustn't C.couldn’t D.wouldn't

【答案】A

【解析】句意：這里相當暖和，我們不需要開暖氣。needn't 不需要;不必;強調客觀條件，常做must問句的回答；mustn't不許，不準，不允許 ;命令的口氣，語氣最強烈“禁止”；couldn't表示不可以，語氣比較委婉，而wouldn't表示不會的意思，表示對過去情況的一種可能推測。

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