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    【题目】We offered these students a summer course, aimed __________ improving their spoken English.

    A. to B. in

    C. at D. for

    【答案】C

    【解析】句意：我们为这些学生提供了一种暑期课程，旨在提高他们的英语口语。aim to do sth.或aim at doing sth.。

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