题目内容
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I don't know what he ________ (do) now, but I know what he ________ (do) this time yesterday.
答案：
解析：
解析：
|
is doing, was doing |
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动词填空
I don't know what he ________ (do) now, but I know what he ________ (do) this time yesterday.
|
is doing, was doing |
阅读快车系列答案