The real reason why prices ____ , and still are, too high is complex, and no short discussion can satisfactorily explain this problem.
A. were B. will be
C. have been D. had been
The whole team _____ Cristiano Ronaldo, and he seldom lets them down.
A. wait on B. focus on
C. count on D. call on
It might have saved me some trouble ______ the schedule.
A. did I know B. have I known
C. do I know D. had I known
The university started some new language programs to _____ the country’s Silk Road Economic Belt.
A. apply to B. cater for
C. appeal to D. hunt for
It is so cold that you can’t go outside _____ fully covered in thick clothes.
A. if B. unless C. once D. when
_____ Li Bai, a great Chinese poet, was born is known to the public, but some won’t accept it.
A. That B. Why C. Where D. How
