Customer:When I bought this cat,you told me he was good for mice. He doesn’t go near them!
Assistant:Well,isn’t that good for mice?
*注:be good for ①對……有作用 ②對……有好處
Stephen:We have got a new dog. Would you like to come round and play with him?Paul:Well,I don’t know. Does he bite?Stephen:That’s what I want to find out.