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
A