（1）你最好写一本关于如何保护动物的书。

You had better a book how to protect the animals.

（2）我们应该知道该干什么和不该干什么。

We should know and .

（3）你为什么不步行上班呢？它对健康有好处。

go to work on foot? That's good for your health.

（4）老师问玛丽：“你有没有更多的想法？”

The teacher asked Mary, “Do you have ideas? ”

（5）我喜欢这本由马克·吐温写的小说。

I like the novel by Mark Twain.