题目内容
She said she returned the book to the library．I'm sure she ________．
| A．did | B．does |
| C．is | D．was |
A
解析试题分析：句意为：她说她把书归还图书馆了。我相信她还了。代动词是代替前面提到的某个动作，以避免重复。根据语境，本句用的是一般过去时，故选A。
考点：考查动词。
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