关于before的选择题He made a mistake,but he corrected it ( ) the situation got worse.A.when B.before C until我知道选B的原因,但不理解为什么不能选A和C呢?the situation got worse.已经构成一个句子,when 和until 怎不得?

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关于before的选择题He made a mistake,but he corrected it ( ) the situation got worse.A.when B.before C until我知道选B的原因,但不理解为什么不能选A和C呢?the situation got worse.已经构成一个句子,when 和until 怎不得?
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关于before的选择题He made a mistake,but he corrected it ( ) the situation got worse.A.when B.before C until我知道选B的原因,但不理解为什么不能选A和C呢?the situation got worse.已经构成一个句子,when 和until 怎不得?
关于before的选择题
He made a mistake,but he corrected it ( ) the situation got worse.
A.when B.before C until
我知道选B的原因,但不理解为什么不能选A和C呢?
the situation got worse.已经构成一个句子,when 和until 怎不得?

关于before的选择题He made a mistake,but he corrected it ( ) the situation got worse.A.when B.before C until我知道选B的原因,但不理解为什么不能选A和C呢?the situation got worse.已经构成一个句子,when 和until 怎不得?
也不是绝对不可以填其他的.根据这句意思最好填before,因为but表示转折.when也行,但不够before好.
He made a mistake,but he corrected it (before) the situation got worse.
他犯了一个错误,但在情况转坏之前他改正了.
He made a mistake,but he didn't correct it (until) the situation got worse.
他犯了一个错误,但直到情况转坏了他才改正.
He made a mistake,but he corrected it (when) the situation got worse.
他犯了一个错误,但在情况转坏的时候他改正了.

句子中用了but表示后面的结局是好的
如果用a的话，那他改了也来不及了
用c的话也表示他改了但是已经迟了
用b的话就表示他改后事情还没那么糟，那结局就是好的了=]

纠正错误应该是在情况恶化之前,不能等到情况恶化了再纠正的.
所以如果选A或C,语意就不通了.

只能说出题人是个豁达乐观的人,他祝愿任何人在事情变糟之前将错误改正.

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