题目内容
7．-Where was your dad at this time last night？-He was talking with my uncle I was looking for some information on the Internet．（ ）
| A． | after | B． | until | C． | since | D． | while |
分析 -昨晚这个时候你的爸爸在干什么？
-我在网上查信息时他正在跟我叔叔交谈．
解答 after"在…之后"；until"直到"；since"自从"；while"当…时候"，常用于过去进行时态中．根据句意及I was looking for some information on the Internet可知，此处用while引导时间状语从句．故选：D
点评 学生在应用while时要注意"while后的从句谓语动词只能是延续性动词，强调主从句的两个动词同时进行，所以常用于过去进行时态"．
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