I wonder ________ as the ads has promised.
A. does the air-cleaner really work B. the air -cleaner really works
C. that the air-cleaner really works D. if the air-cleaner really works
“One Belt, One Road (一带一路)” will help to ________ markets for China as well as other countries along.
A. put up B. look up C. take up D. open up
--- Did you enjoy your time in the concert?
--- Yes, I have never been to _________ one before.
A. a better B. the best C. a worse D. the worst
--- Oh, dear! A power cut!
--- Sorry, I didn’t know you _________ the washing machine.
A. are using B. used C. use D. were using
--- I watched “Super Brain” yesterday. ______ wonderful game show!
--- Yes, and we can learn many amazing things.
A. What a B. What C. How a D. How
--- Aunt Li, who is the lovely boy in red in the picture?
--- It’s my son. The picture ________ 10 years ago.
A. took B. is taken C. has taken D. was taken
