Mark the letter A, B, C, or D to indicate the correct answer to each of the following questions.
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
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
Loga
Hóa Học lớp 12
