They have not made any decision on they are going to do to deal with the waste and contro

发布时间：2020-08-16 08:41:51


They have not made any decision on      they are going to do to deal with the waste and control pollution.
A. that
B. which
C. if
D. what

网友回答

A. that
B. which
C. if
(答案→)D. what
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