--Mum, it's late. Why are you still here?
--Dad hasn't come back yet. I for him.
A. am waiting B. was waiting C. waited
-- Excuse me, sir, smoking in the gas station.
-- Oh, I'm really sorry.
A. doesn't allow B. isn't allowed C. aren't allowed
-- Do you know Mo Yan?
—Of course. He is the famous writer ____ won the Nobel Prize in 2012.
A. who B. whom C. which
-- The boy can speak both English and Japanese ______ he is only ten.
-- Wow, what a clever boy!
A. if B. because C. though
- Is James at home?
-- No, he Ya'an to be a volunteer.
A. has gone to B. has been to C. is going to
— Nick, would you mind out of the bathroom?
— Sorry. I won't be long.
A. come B. to come C. coming
