It's out of the question.

这是不可能的。

It hurts like hell!

疼死啦！

I think it's a reasonable price.

我觉得这是个合理的价钱。

It is so necessary for you to have some rest and relaxation.

你特别需要休息和娱乐。

There's nothing like a cup of tea when you're thirsty.

当你口渴时，没有什么东西比一杯茶更好了。

The homework took me a whole day.

做家庭作业花了我一整天的时间。