—David, could you tell me ______? —Every four years.
A. when the 2014 World Cup finished
B. how often the World Cup takes place
C. how many teams take part in the World Cup
D. who may score the most goals in the World Cup
____________ Tom __________ Mary speaks good Chinese, so they can communicate with these Chinese students very well.
A. Neither； nor B. Not only； but also
C. Both； and D. Either； or
If you have any problems, you can ask Dr. Know-all _________ help.
A. at B. on C. for D. with
—Great changes have taken place _____ we enter E-Times.
—Yeah. I agree with you.
A. since B. as soon as C. when D. before
Look at the math book. Do you know ______ it might be?
A. where B. who C. what D. whose
How I wish I could sleep longer! However, I had to get there before the plane_________.
A. ran off B. went off
C. took off D. set off
