Are these them?有语法错误吗

Are these them?有语法错误吗 these are dolls( )them we would help them if them are in distrss.这个are有we would help them if them are in distrss.这个are有语法错误吗 these are dolls( _) them these shoes are at a very good price这句话有语法错误吗 what are you busy about these days?(这句话有语法错误么?) they are doing their homework now they must hand in them after class.有语法错误吗? Are these ( ) books?A:they B :them These are[ ]questions.You can answer them[ ] These are[ ]question.You can answer them[ ] Opportunities are everywhere,but you should seize them in the right time.请问,以上这句话有什么语法错误呢? 这句话,有语法错误吗?应该怎么改?the feature is that these persons in the house are sitting nearly,but they are communicating through the Internet. these are my books.Please them to the classroomthem前填啥? Whose sweaters are these?I think they are__________(them) These exercises are difficult to do.F_____students can answer them These are all new words.Please write down them改错 These sweaters are ( i--------) .You can afford them.请说明 These are your ciothes.Put on them（改错）