问题
选择题
They often play games ________ free time.
A. at B. on the C. in their
答案
答案：C
表示在空闲的时间通常用介词in，故本题选C。
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They often play games ________ free time.
A. at B. on the C. in their
答案：C
表示在空闲的时间通常用介词in，故本题选C。