读对话，选择最佳答案，将字母标号填在横线上。

Sandy: Hi, Sam!

Sam: No.I don't. I'm afraid you have to buy one.

Sandy: Where is the bookstore?

Sam:

Sandy:

Sam: Go straight for fifteen minutes .Then turn left and you'll see it.

Sandy: Thank you.

Sam: By the way ,will you go to the science museum with me tonight?

Sandy: Sorry.

Sam: That's OK.

A. It's on Wenhua Street. B. I have to do my homework. C. You're welcome. D. How can I get there? E. Do you have a comic book?