The air in this area got
A: to pollute
B: pollute
C: polluting
D: polluted
A: to pollute
B: pollute
C: polluting
D: polluted
举一反三
- Many lakes and rivers have been___by industrial waste. A: polluted B: polluting C: pollute D: to pollute
- Electric vehicles will save a lot of air ______ because there will be no emission of CO2 in the air. A: pollute B: polluted C: pollution D: polluting
- One benefit the author mentions is that the system______. A: uses no electricity B: has a fire-safety shutoff C: does not pollute the air in the house D: pollute the air in house
- Cars are currently the major source of air (__)(pollute).
- Many lakes and rivers have been ( )by industrial waste. A: public B: put C: polluted D: pollutE