複選題49. A: Why are you standing here looking at the top of the shelf？B: Oh, I want to get the book on the top of the shelf, but I am not tall enough to reach it.A: I see. ____________B: Yes! That would be great! Thanks a lot！(複選)(A) Can you get it by yourself？(B) Would you like some help？(C) Do you need help？(D) Do I make myself clear?