The accident happened at nine o'clock in the morning ____ we were all busy with our work. [ ]A.

题目简介

The accident happened at nine o'clock in the morning ____ we were all busy with our work. [ ]A.

题目详情

The accident happened at nine o'clock in the morning ____ we were all busy with our work.
[     ]
A. that
B. which
C. when
D. as
题型:单选题难度:中档来源:山东省模拟题

答案

C

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