描述过去与现在的对比 — 英语情景题

Read and complete.（补全对话） Lily: Sam, look at this old photo. You were so small then! Sam: Yes, I (1)________ short and thin ten years ago, but now I am tall. Lily: Your hair (2)________ short then, too. Sam: Right, but my hair is long now. Lily: Was your classroom big before? Sam: No, it (3)________. It was small before, but it (4)________ big now. Lily: Everything changes!