Most forests in other climatic areas by human beings.
Most forests in other climatic areas _________ by human beings.
A. have already been affected
B. have already affected
C. have already been affecting
D. had already been affected
Đáp án A
=> Hầu hết các khu rừng trong vùng khí hậu đều chịu ảnh hưởng từ con người.