第二个问题：
1.Their classroom is cleaned after school (by them).
2.Tom was given a new pen (by Li lei)last week.或
A new pen was given to Tom (by Li Lei)last week.
3.后面没有no吧!English is spoken (by a lot of people)in China.
4.English has been learnd for about two years (by me).
5.These story-books will be written (by them )next month.
你最好学会被动语态的结构：be done.
第一个问题需要你自由发挥的,应该没有限制.
如有问题可以继续问我.