If the global population goes on increasing at its present rate, by the middle of the 21 st_______century, we all our oil reserves.
A.will have used up B.are using up C.will have been using up D.have used up正确答案A
If the global population goes on increasing at its present rate, by the middle of the 21 st_______century, we all our oil reserves.
A.will have used up B.are using up C.will have been using up D.have used up正确答案A
