题目内容
Professor Haley told me that he__________by many of his students at the railway station.
| A.had been seen off |
| B.have been seen off? |
| C.had seen off |
| D.have seen off |
A?
学生为Haley教授送行的事实发生在他告诉我之前,故而要用过去完成时。?
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