He doesn’t know what __________ the problem.
A. to do
B. do
C. to do with
D. do with
—Why are you so worried?
—I am waiting for a call from my daughter. She __________Sydney.
A. has gone to B. has been to
C. has been in D. has left to
— _______have you worked in the company? —Since 2003.
A. How often B. How long C. When D. How many
It’s raining harder and harder. I ________ stay at home and do some reading.
A. have to B. must C. should D. need
— Excuse me， __________ is it from our school to the underground station?
— Let me see. It’s about 10 minutes’ bus ride.
A. how long B. how far
C. how much D. how often
—Lisa， you’re so kind to help me. Thanks a lot.
—__________.
A. Certainly not. B. My pleasure.
C. With pleasure. D. Take it easy.
