--- I hear a number of workers in the factory ______ out of work.--- Yes, and the number _______ quite huge.

 You, who ______ his good friend, should help him get out of trouble. 

Not far from the house ____ two gardens, ______ seated nearby playing bridge with his children．

The number of the students in our school ____ rising since 2006.

 One-third of the area ________ covered with trees. About seventy percent of the trees _______ been planted recently.