阅读短文，判断正误。Mike: Good morning, Nancy.
Nancy: Good morning, Mike.
Mike: Look! What's this?
Nancy: It's a duck.
Mike: It's lovely and fat. I like it.
Nancy: Me too!
Mike: What are those behind the tree?
Nancy: They're cows. They can give milk.
Mike: Let's milk the cows(挤奶).
Nancy: OK.
