第一句：someone's中间无空格,Picasso's "are" appeared主意单复数
第二句：错误太多我重新写吧
Part of the cause which made their profits increase was having used the freshing marketing strategy.
第三句用个从句就行The man "tells the woman to put"..."cabinet that children couldn't"...
第四句isn't certain改成might not be
第五句没错,但也可以这么翻译
The car brought me many troubles after I bought it.