is / are 与主语的单复数一致 — 英语情景题

情景对话：Sam 和 Lily 在公园里散步。（补全对话，每空一词） Sam: Look, Lily! There (1)________ a big tree over there. Lily: Yes! And there (2)________ two birds in the tree. Sam: I can see some apples on the ground. Lily: How many apples can you see? Sam: There (3)________ three apples. And there (4)________ an orange too. Lily: Oh, there (5)________ some rabbits near the flowers!