The students busily when Miss Brown went to get a book she in the office. [ ] A.
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![The students busily when Miss Brown went to get a book she in the office. [ ] A.](/pic/43_990172.jpg)
The students ___________ busily when Miss Brown went to get a book she ___________ in the office.
[ ]
A. had written; left B. were writing; has left
C. had written; had left D. were writing; had left
试题答案
答案:D