问题

Has your friend completed his design – Not yet. He ________ on it last night.
A:worked
B:has worked
C:is working
D:was working;
B:has worked
C:is working
D:was working;
正确答案是:
同类题型
In the end I lost my and shouted at her.
To learn English well, we should find opportunities to hear English as much as we can [ ]
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In today’s class Miss Wang is going to _____ the story where he left off yesterday.