题目内容
() 6. The factory its waste into the river,but now it recyclewS the waste in a new way.
A. used to put B. is used to put
C. used to putting D. is used to putting
6. A
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题目内容
() 6. The factory its waste into the river,but now it recyclewS the waste in a new way.
A. used to put B. is used to put
C. used to putting D. is used to putting