问题

I hear Sam has gone to Qingdao for his holiday.— Oh, how nice! Do you know when he________

A:left
B:was leaving
C:has left
D:had left;

正确答案是：

同类题型

When the teacher found some of his students getting nervous at the examination, he told them to _____ .

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Both sides have accused of breakingthe contract of ____