题目内容
—Mom, shall we have supper now?
—Oh, we won’t have supper ______ your dad comes back.
A. until B. since C. while D. after
A
【解析】连词的用法。until用于否定句中,表示句子的动作直到until短语所表示的时间才开始发生,即表示动作的起点。While跟连续性的动词;since连接的句子主句一般用现在完成时,从句用过去时。
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