- A.environmental pollution
- B.1ack of natural resources
- C.the destruction of forests
- D.the rapid population growth
- A.Many local governments only purchase paper made from recycling.
- B.Scientists are hopeful about reducing the bad effects of overpopulation.
- C.Scientists are discouraged by the seriousness of environmental problems.
- D.Lots of companies are moving from big cities to small ones in the US.
- A.big cities can better develop their economy with less pollution
- B.fewer people will suffer from the pollution caused by factories
- C.the local governments call better serve the needs of their residents
- D.farmers can grow and process their own food,fruits and vegetables
- A.restore
- B.stimulate
- C.change
- D.control
- A.Schools should do away with lecturing.
- B.Interactive teaching requires more teachers.
- C.Students are more willing to learn in interactive classes.
- D.Teachers enjoy interactive teaching more than lecturing.