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补全对话
A: It's Sunday today. We don't have lessons.
B: Yes. Let's go to Grandpa's.
A: Great. Let's go.
B: Look, what on the tree?
A: They're. Would you like one?
B: , please. Can you pick（摘）one for me?
A: Sorry, I. It's difficult. We can ask（请）
Grandpa for helping.
B: OK. Oh, look at these.
A: They're lovely.
