17．The population of China ________(be)the largest in the world.

16．Ten thousand tons of coal ________(be)produced last year in that coal mine.

15．Every teacher and student ________(have)good reason to be proud of their school.

14．None of the materials ________(be)conductors.

13．What he says or what he does ________(not concern)me.

12．A large quantity of coal ________(ship)here since last September.

11．About two-thirds of his property ________(be)lost in the flood.

10．There ________(be)a pair of compasses on Lucy’s desk.

9．Do you know what politics ________(be).

8．The United States ________(lie)in the Western Hemisphere.