33. Nowadays, useof certain waste materials to protect the environment.A. is makingB. will

发布时间：2020-08-15 02:38:19


33. Nowadays, use    of certain waste materials to protect the environment.
A. is making
B. will make
C. is being made
D. will be made

网友回答

A. is making
B. will make
(答案→)C. is being made
D. will be made
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