WE CAN PROTECT THE ENVIRONMENT BY ... AIR POLLUTION. A. TO REDUCE...

475. - 1000 CAU TRAC NGHIEM TIENG ANH ON THI THPT QUOC GIA CO DAP AN
1000 CAU TRAC NGHIEM TIENG ANH ON THI THPT QUOC GIA CO DAP AN

475. We can protect the environment by ... air pollution.

A. to reduce

B. reduced

C. reducing

D. reduce