If you want to get good grades, you have to spend much time for the exam.

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编辑：chaxungu时间：2026-04-27 03:10:45分类：高中英语题库

【题目】If you want to get good grades, you have to spend much time (prepare) for the exam.
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【答案】(in) preparing
【解析】(in) preparing spend...(in) doing sth.“在做某事上花费……”，故填(in) preparing。