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ThestudentsbusilywhenMissBrownwenttogetabooksheintheoffice.[]A.hadwritten;leftB.werewriting;hasleftC.hadwritten;hadleftD.werewriting;hadleft
题目详情
| 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 |
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答案和解析
| D |
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