----What ________ the number of the students in your school?      ---- About two thousand. A number of them _______ from America.

 Mom used only half of the money, the rest of which ______ saved for other purposes.

. It is not I but you who ___ the first to run to the goal in the competition.

Three hours with your girl friend  _____to be a short time.

 The writer and professor, whom I often refer to at the meetings, ____ famous for those works.