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New ways have been found to prevent the river______.

题目
单选题
New ways have been found to prevent the river______.
A

not to be polluted

B

against polluting

C

from polluting

D

from being polluted

参考答案和解析
正确答案： A
解析：
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该题考查独立主格结构。其中A new technique与work out之间的关系是被动关系,所以排除A、B选项,而D选项为不定式完成式的被动式,常用于sb./sth.is said/believed to have（been）done...这样的句型中,表明其动作在谓语动词动作之前已发生,如：He is said to have written some books.或His works is believed to have been translated into ma

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第9题：

It is postulated that a cure for the disease will have been found by the year 2000.

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答案：B
解析：
考查虚拟语气。当从句中出现without/ but for 等词时，主句要用虚拟语气，根据句意，如果没有新能源，机械改革不会诞生，再结合整句话的时态，应该用could not have been born。

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