1.Government organizations are helping people to dispose
____________ safely old refrigerators or, in the case of cars, to upgrade the air conditioning.
A. away
B. off
C. of
D. out of
2.As the students grow older, they can be more aware of all the
environmental problems that are ____________.
A. happening on
B. getting along
C. getting on
D. going on
3.If people throw cigarette butts on the floor, they should
____________.
A. fine
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