题目内容
桯as William finished writing his gradua-tion paper yet?
桰 don't know exactly, but he ________ all day.
A. is writing
B. has been writing
C. was writing
D. wrote
答案：B
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桯as William finished writing his gradua-tion paper yet?
桰 don't know exactly, but he ________ all day.
A. is writing
B. has been writing
C. was writing
D. wrote
阅读快车系列答案