问题描述：
His hobby is to collect stamps in his free time.(同义句转换）
（）his hobby ( ) ( ) stamps in his free time
请问这三个空里应该填什么啊?（每个括号里限填一词）
（）his hobby ( ) ( ) stamps in his free time
请问这三个空里应该填什么啊?（每个括号里限填一词）
问题解答：
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