what做主语引导的是什么从句

　　You can't stop people from saying what they think.

　　人们怎么想就会怎么说，你阻止不了。

　　What will the cities of the future look like?

　　未来的城市会是什么样子呢？

　　What books have been set for the English course?

　　英语课布置要用哪些书？

　　I never know what to expect from one day to the next.

　　一天又一天我不知道该期待什么。

　　What made you go into law?

　　是什么促使你从事律师业的呢？