– ________ do you fly to New York on business?
– Nearly once every two months.
A. How fast B. How soon
C. How long D. How often
This problem ________ be talked about any more. We’ve found the solution.
A. mustn’t B. shouldn’t
C. needn’t D. can’t
If you continue to use old-fashioned (过时的) language, young people will ________that you haven’t kept up with today’s thinking and knowledge.
A. consider B. correct
C. control D. Create
By the end of last week, Maggie________ in the west of China for two months helping the homeless children.
A. will stay B. has stayed
C. would stay D. had stayed
Reading provides me with fun and it also enables me ______ the world around me.
A. understand B. understood
C. to understand D. understanding
Stop ________ about the haze(雾霾). Just think about what we can do to improve it.
A. complain B. to complain
C. complaining D. Complained