1.The dictionary cost him 100 yuan (這本字典花了他100元.)
2.If you don't do exercise,you will be unhappy(如果你不做運動,你會不開心.)
3.What about going to school?(去學校怎么樣?)
4.What happened to the little boy?(這個小男孩怎么了?)
5.The students didn't leave until the rain stopped.(學生們直到雨停了才回家.)
6.We dont't know where we can go?(我們不知道可以去哪里.)
7.They didn't know what they could do?(他們不知道自己可以做什么.)
8.He doesn't know how he can operate the train.(他不知道自己怎樣才能操作這列火車.)
9.why not send him to prison?(為什么不把他送到監(jiān)獄?)
10.you never forget what you should do.(你從來不會忘記自己應該做什么.)