The kids often help the old in their ( ) time 括号内填空

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The kids often help the old in their ( ) time 括号内填空

spare
不懂的问我哦

free

free

The kids often help the old in their (free ) time.

The kids often help the old in their (spare) time .
应该是这样滴~
这样表达 空余时间 比较地道
free一般用在系表结构中,eg.I'm free.

free