【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(dāng)暖和，我們不需要開暖氣。needn't 不需要;不必;強(qiáng)調(diào)客觀條件，常做must問句的回答；mustn't不許，不準(zhǔn)，不允許 ;命令的口氣，語氣最強(qiáng)烈”禁止”；couldn't表示不可以，是can的過去式，加not，語氣比較委婉，而wouldn't有表示不會(huì)的意思，是will的過去式，表示對(duì)過去情況的一種可能推測(cè)。

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