1、It's nothing（改为none） of your business what other people think of you.
2、Thousands of tourists arrived at（改为in） Australia for the music festival.
3、Single mother（改为mothers） may also receive help from a new programm.
4、A lot of young people go to（把to去掉） abroad for further study.
5、I already saw（改为have already seen） that film,so l don't want to see it again.