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Mr Black was doing shopping at the supermarket ______ his mobile phone rang. [ ]A. when B. while C.

题目简介

Mr Black was doing shopping at the supermarket ______ his mobile phone rang. [ ]A. when B. while C.

题目详情

Mr Black was doing shopping at the supermarket ______ his mobile phone rang.

[ ]

A. when
B. while
C. after
D. until

题型：单选题难度：中档来源：模拟题

答案

A

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