从方框中选择正确的答案补全对话，只填序号。

A: Are they hens? B: They are green beans. C: What are these? D: Thank you. E: Seventeen.

Mike: Your farm is so big. I like it.

Farmer:

Mike: What are those? They are so long.

Farmer:

Mike: I like to eat them. Wow! So many animals.

Farmer: They are horses.

Mike: How many horses do you have?

Farmer:

Mike: What about those?

Farmer: No, they aren't. They are ducks.