摘要： We must do everything we can waste water from running into rivers. A. keep B. kept C. to keep D. keeping
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We must do everything we can _____ waste water from running into rivers.
[ ]
A. keep
B. kept
C. to keep
D. keeping
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B. kept
C. to keep
D. keeping
We must do everything we can waste water from running into rivers.
[ ]
A. keep
B. kept
C. to keep
D. keeping
查看习题详情和答案>>
B. kept
C. to keep
D. keeping
We must do everything we can _______ waste water from running into rivers.
[ ]
A. keep
B. kept
C. to keep
D. keeping
查看习题详情和答案>>
B. kept
C. to keep
D. keeping