（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.
