题目内容

________ has already been pointed out, only by correcting mistakes can you make progress.
A．ItB．AsC． ThatD．What
B

试题分析：考查固定句型，固定句型As has already been pointed out意思“正如已经指出的那样”， It可以做形式主语或形式宾语；That只起引导作用，没有意义；What表示什么，可以引导从句，句子意思“正如已经指出的那样，只有通过纠正错误你才能进步”
点评：固定词组是常考内容，平时要多记多积累，只要知道它们的意思，做固定词组题时，就很容易做出正确选择
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