57.They asked the government to make _______ clear to the pu

57.They asked the government to make _______ clear to the public _______ they did was right
A.it; that B.it; what C.
that; what D.this; that
选哪一个啊

此处选B
it作形式宾语,后接that引导的宾语从句,对形式宾语的内容进行修饰补充
*此处省略了引导词that
在从句中what作为引导词引导了主语从句,what they did充当从句部分that what they did was right的主语部分.
所以此句应为They asked the government to make it clear to the public (that) what they did was right.
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