1.insist on 坚持,一定要

Customize the product or insist on the cookie-cutter model?
按客户的需求定做产品或者坚持些模型？

I insist on quietness in my room.
我要求在我的房间里要安静。

2.be confident of 对…事有信心，确信…

Only thus can you be confident of yourself.
只有如此,你可以相信你自己。

My father has helped me to be confident of being myself as well.
父亲也给了我以信心做我自己。

3.use to 过去常常

Below are different strategies you can use to help you deal with each of these negative emotions.
下面介绍了一些不同的方法可以用来帮助您处理每一种负面情绪。

Mining has led to water polluted by mercury which miners use to separate the metal from river sediment.
但开采者常用来从河沙中分离黄金的水银也导致了河水的污染。

4.give back 归还，恢复；后退

You could give back the money you owe me.
你也可以把欠我的钱还给我。

What a nice way to give back to the community and help others!
这是多么好的一种回馈社会和帮助他人的方法啊！