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

Nobody in our class but Tom and I ___ that our monitor is going abroad for further education.

All possible means ______. However, nothing can _____ his wife dying of lung cancer.

The country’s population ______ small, and most of its population ______ in the mountainous areas．

 —________ two months enough for the project to be finished?—I am afraid not. The professor is ill and only after he recovers ______ go on with it.