帮忙将下列的句子改成被动语态!
1、people also speak English in Austraila
2、You should keep your clothes clean and tidy
3、We must speak to older people politely
4、A friend of mine gave me a ticket for football match
5、When did they build the Great wall
6、We often see the little girl read English
7、He will lend me a pen
8、Have you every heard of the man?