【題目】My mother was making dinner I was doing homework.

A.while B.at what time C.at soon as D.until

【答案】A

【解析】

試題分析：句意：我媽媽在做晚飯，我在做作業(yè)。while 當(dāng)……的時候，強(qiáng)調(diào)主句謂語動詞表示的動作持續(xù)于while從句所指的整個時間內(nèi)；at what time在什么時候；at soon as一……就；until直到。所以選A。

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