—Hi, why are you here?—I ________ for Susan for 15 minutes.A. have been waiting B. have waiting C. am waitingD am been waiting
---How about going out for a walk with us? ---I wish I could, I have to finish my homework first.
Excuse me, can you tell me when?
Loud music always makes us .
Tom said he to Guangzhou.
of them enjoys traveling by plane.