1、Is Sam stronger than Amy?A：Yes,he is.B:Yes,she is.2、Is the

第2题和第3、4题呢

提示什么

1、Is Sam stronger than Amy? A：Yes,he is. B:Yes,she is. 2、Is the Changjiang River longer than the Yellow River? A：yes,it is. B:No,it isn't 3、Daming is younger than Amy. A:yes,she is. B:No,she isn't 4、This dog is fatter than that dog.Is that dog fatter than this dog?A：yes,it is. B:No,it isn't

第三题我再补充一句：Daming is younger than Amy. Is Amy older than Daming?