句型Look at...观察植物 — 英语情景题

情景对话：补全对话，每空一词。Sam和Lily在植物园里观察植物。Sam: What's that over there? Lily: (1)________ at that tall tree! Sam: Wow, it's so tall. What's this? Lily: This is a beautiful lotus. Sam: (2)________ nice! Lily: (3)________ at these small flowers. They're lovely. Sam: Yes, I like them.