根据所给句子，选择最佳的应答语。每个选项只能用一次。 (     )1. What are you doing now? (     )2.  Excuse me.  Do you know where I can buy some stamps? (     )3.  Could you tell me how to get to Killeen's Cafe? (     )4.  Where do you often hang out on Sunday? (     )5.  Have you watched Monkey King? A. I go to the watertown with my friends. B. Sure.  It's so interesting. C. Go straight ahead.  The bank is on your right. D. Sure.  There is a post office on the left of the road. E. I'm going to the Sunville Bank. F. Of course.  Take elevator to the third floor.  It's next to the book store.