New ways _____ to prevent the river ____
题型:选择题
问题:
New ways _____ to prevent the river _____.
A.have found out, from polluting
B.have found, from being polluted
C.have been found out, from being polluted
D.have been found, from being polluted
New ways _____ to prevent the river _____.
A.have found out, from polluting
B.have found, from being polluted
C.have been found out, from being polluted
D.have been found, from being polluted