帮忙把这4个英语句子变成被动语态

Question

1.The runners exercised a lot.They took part in the 2008 Olympic Games.
2.We went back to the market.The old man left.
3.Richard ate all the cakes.His mother arrived home.
4.My father looked up a lot of information.He went to tibet.

Answer 1

好无聊的作业!
有必要改吗?
只有第3句还有改头,其它改变毫无意义,也无法改。

3.All the cakes were eaten when his mother arrived home.

第4句前部分可以改，但如果跟后部分相连，也无意义。

4. A lot of information was looked up... （晕！什么玩意？）

Answer 2

这4个句子不能变成被动语态，不符合被动语态的要求

参考资料：中学英语语法

Answer 3

有意思么这..根本没办法改..改了也很别扭好不好.叫你们老师下课回家

Answer 4

没见过这些形式有变化啊？