补全对话
A. How can I get there? B. Thanks a lot. C. Is there a bookstore near here? D. Where is it? E. Can you help me, please? |
Sarah: Excuse me, sir.____
Alex: Sure.
Sarah:____
Alex: Yes, there is.
Sarah:____
Alex: It's near the park.
Sarah:____
Alex: You can go there on foot. It's not far. Go straight. Turn left at the crossing. You will see it.
Sarah:____
Alex: You're welcome.
的展开式
中
的系数为（ ）