The two students are American,aren't they?应怎样回答

The two students are American,aren't they?应怎样回答 Old trees aren't important ,are they 怎样回答 Old trees aren't important ,are they?怎样回答? Not all the students are going to the zoo,are they or aren't Whales aren't fish,are they?回答 完形填空：Tom and Amy are( )students,they aren't in the same scho The hats aren't( ).They are ( ). The cat aren’t ---------------------.They are -----------. They are onions ,aren't they?怎么回答? The litter basket aren't always used,are they?这句的肯定回答是什么求解? There aren't many shopping malls in the city,are they?怎么回答?回 The are two (American).