—Which of the two computer games did you prefer?—Actually I didn’t like ______.

 The TV sets made by our factory sell best, but 10 years ago no one could have guessed the place in the markets that they _______.

______ students up to 2, 000 , the school has built another laboratory．

 Richard was called in by the police to answer questions _______ the disappearance of Thomas Ripley, whose relatives were so ______ his present situation.

— Why are you so popular with your students?— As a teacher, I seldom give my students so difficult a problem ____ they cannot work out.