The factory ______ its waste into the river, but now it deals with the waste in a new way.
A.used to dump | B.is used to dump |
C.used to dumping | D.is used to dumping |
The factory ______ its waste into the river, but now it deals with the waste in a new way.
A.used to dump | B.is used to dump |
C.used to dumping | D.is used to dumping |