I don’t know what he _______when Mr.Wu came in . A. was doing B. has done C. is doing D. would do
2022-10-08 10:44:15 66次 牛津英语9A Unit 3 单元测试 单选题 反馈错误 加入收藏 正确率 : 100%
题目内容：
I don’t know what he _______when Mr.Wu came in .
A. was doing B. has done C. is doing D. would do
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