practice后面加什么?

　　It's time for more practice on doing something.

　　是该加强做某事的实践了。

　　And it will give you practice in doing it.

　　这给了你们实践的机会。

　　He followed his usual practice of doing the work.

　　他遵循了自己的做事习惯。

　　Well, they have enough practice at doing those things in their own country, don't they?

　　但是他们可以在自己的国家干这些事，不是么？

　　PLC Control Technology is a course requiring more practice and doing experiments is its key teaching link.

　　PLC控制技术是一门实践性很强的课程，实验是其重要的教学环节。