Tom makes the most use of his spare time to learn English, he wants to be a useful in the future.

汤姆充分利用闲暇时间学英语，他想以后成为一个有用的人。

youdao

Tom often spends his spare time (in) playing the piano.

汤姆经常把他的业余时间用来弹钢琴。

youdao

Tom often spends his spare time (in) playing the piano.

汤姆经常把他的业余时间用来弹钢琴。

youdao