There is still a long way to go to solve
题型:选择题
问题:
There is still a long way to go to solve all the problems ______ conservation of natural resources.[ ]
A. concerning
B. concerned
C. concerning about
D. concerned about
There is still a long way to go to solve all the problems ______ conservation of natural resources.[ ]
A. concerning
B. concerned
C. concerning about
D. concerned about