Yesterday evening, I _____ along the street when I suddenly met my maths teacher.
--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