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
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
D
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