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