Now more and more people have come to kn
题型:选择题
问题:
Now more and more people have come to know the role that trees _____in our natural environment. [ ]
A. do
B. take
C. play
D. work
Now more and more people have come to know the role that trees _____in our natural environment. [ ]
A. do
B. take
C. play
D. work