A. another B. plentiful C. dangerous D. limited
2. A. population B. education C. development D. satisfaction
3. A. countryside B. natural C. changeable D. dioxide
4. A. renewable B. artificial C. unfortunate D. continuous
5. A. easily B. energy C. negative D. consumption
6. A. musician B. scientist C. energy D. biogas
7. A. advantage B. atmosphere C. motorbike D. generate
10. A. excellent B. dangerous C. plentiful D. polluting
11.A. spinach B. chopstick C. disease D. lifestyle
12.A. scabies B. salubrious C. nutrition D. infirmary
13.A. absent B. harvest C. balanced D. hotel
14. A. early B. asleep C. machine D. begin
