My father was preparing for his speech _...[九年级][地理]
收录时间：2021-11-01 答题：初三地理（武老师）
【题目】My father was preparing for his speech __ my mother was doing some washing last night.
A.if B.while C.unless D.until
【答案】B
【解析】
考查时间状语从句。句意“昨晚我爸爸正在为演讲做准备，而妈妈正在洗衣服。”while表对比，前后都用进行时。故选B。
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