【題目】When he came back from abroad，our country was ________with Japan.

A．a(chǎn)t a war

B．a(chǎn)t war

C．a(chǎn)t the war

D．on war

【答案】B

【解析】be at war with“與……交戰(zhàn)”，為固定搭配，war前不加冠詞。

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