Read and fill. 根据上下文补全对话。
Liu Lan: Wow, vegetables. What are these?
Mary: They 1. carrots.
Liu Lan: Are 2. bananas?
Mary: No, they aren't. They are cucumbers.
Liu Lan: Are 3. onions?
Mary: Yes, they are.
Liu Lan: 4. are those?
Mary: They are potatoes.
Liu Lan: I like 5. potatoes.
Mary: Me, too.
1. are 2. they 3. they 4. What 5. eating