题目内容
29. New ways _____ to prevent the river _____.
| A.have found out, from polluting |
| B.have found, from being polluted |
| C.have been found out, from being polluted |
| D.have been found, from being polluted |
D
解析
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题目内容
29. New ways _____ to prevent the river _____.
| A.have found out, from polluting |
| B.have found, from being polluted |
| C.have been found out, from being polluted |
| D.have been found, from being polluted |
D
解析