问题

The government has to close those small factories to prevent the water of the river ______.
A:polluting
B:from polluting
C:being polluted
D:polluted;
B:from polluting
C:being polluted
D:polluted;
正确答案是:
同类题型
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I called you at eight last night. But you didn’t answer.–Sorry. I the flowers in the garden.
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