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.were writing, had left | D.had written, had left |
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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.were writing, had left | D.had written, had left |