问题
选择题
| It took me a long time before I was able to fully appreciate what they _____ for me. |
A. had done B. did C. would do D. were doing |
答案
答案：A
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| It took me a long time before I was able to fully appreciate what they _____ for me. |
A. had done B. did C. would do D. were doing |
答案：A