You can't imagine that a top student          ______ have failed in the college entrance examination. 

 — Did you hear about Zhang Lili who saved the kids from being run over by a school bus? — Yes. What do you think most people _____ if they were in a similar situation?

She wishes she ______ to the theatre last night.

 —Where will you start your work after graduation?—Mmm, it's not been decided yet. I ____ continue my study for a higher degree.

--- Is there a bus to the downtown? -----There ____ be, for it is too late now. You’d better take a taxi.