Are they the children's books?这句话对吗?Are they the children's books?和Are these the children's books?哪个是对的啊?

He felt ____(happy)during his holiday and the childre are playing _____(happy)in the park. generally,the childre raised in such families are far more likely to be afflicted with constant fear. 英语能人进.短文填空Many people may think that a------ in the zoo are happy and lucky,but most of them are sad.Do you konw why?Animals l----- tigers,lions and bears usually l------in forests or mountains.They run,jump,play w-----their childre are they on the They are between the They are the same. they are not the().They are different 解释句子where is the Childre's Hospital 用括号中的时间状语改写句子The childre are playing chess(at 4:00 pm yesterday)What are you doing now?(at that time)Ilistened to the radio.(when Mther came back) Are they [ ] [clean] the room. they are shopping[ ]the mall they are ( ) the basketball team they are going to the Are they in the door? They are looking ( )the eggs. They are cleaning the house. they are ()() the young pioneers they are the---(work)----(wife)