Recent study shows that regular review leads to ______performance on tests.A、imp

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问题 Recent study shows that regular review leads to ______performance on tests.

选项 A、improve
B、improves
C、improved
D、improvement

答案 C

解析有些动词的过去分词可以充当形容词，这里improved的意思就是“改良的，提高的，完善的”。是形容词，可以修饰performance，其他三项的词性不符合题干要求。所以本题答案选C。

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