1. B

2. B

3. A

4. C

5. A

1,Today many countries are trying to develop ................ energy resources.

A. winnable    B. sustainable    C. damaging   D. bottomless 

2)Life is getting more and more difficult for ................ 

A. the poor people   B. the poor.                    C. poor             D. poor people 

3)Most governments intend to improve ................ of their citizens.

A. the life standards         B. the life quantity

C. the living standards        D. the quality life

4)In 2000, ............... world’s population was about 6.6 billion.

A. a     B. an     C. the       D. no article 

5)It is ............... time to do something to control birthrate.

A. a     B. an     C. the       D. no article