1. One-third of the area _____ covered with green trees. About seventy percent of the trees _____ been planted.

   A. are; have      B. is; has       C. is; have       D. are; has

2. The number of teachers in our college _____ greatly increased last term.¡¡
A number of teachers in this school _____ from the countryside.

   A. was; is        B. was; are      C. were; are      D. were; is

3. What _____ the population of China? One-third of the population _____ workers here.

   A. is; are         B. are; are      C. is; is        D. are; is

4. Not only he but also we _____ right. He as well as we _____ right.

   A. are; are        B. are; is       C. is; is        D. is; are

5. What he’d like _____ a digital watch. What he’d like _____ textbooks.

   A. are; are        B. is; is       C. is; are        D. are; is