Question

每天练习英语是很重要的,在这方面他倾注了他大部分的课余时间（Of,devote）

Answer 1

It is of great importance to learn English everyday,he devotes his most spare time to this side.

（be of great importance to do sth:做……很重要

devotes …… to ……：把……投入到……）

楼主给分吧……^-^