补全对话练习一:They are having a picnic.Amy: Hello, Mike. _ A, Can I have some bread?Mike: Bread.Amy: _ B, Have some apples, too.Mike: Here you are. _Amy: Sorry, I dont like apples. Can I have some bananas? C, Whats that?Mike: _ Amy: Thank you. _D, How many bananas do you have?Mike : I have twenty