Chọn đáp án thích hợp nhất vào chỗ trống

CHỌN CÂU THÍCH HỢP VÀO CHỖ TRÓNG.

1) The natural environment consists ________ all natural resources.
A. in
B. of
D. on
2) Nuclear energy is ________, but it is dangerous.
B. non - renewable
C. renewable
D. fossil fuel
3) The earth's fossil fuels are running ________.
A. out
B. about
C. away
4) - I really want to know how to reduce air pollution.
- ________________________________________
A. Because of your carbon footprint.
C. No. I will look for it on the internet.
D. Using puplic means of transport is one of the most effective ways.