1.答案: can't adapt/adjust themselves to the changing environment
详解:
考查词汇: "适应"可译为adapt/adjust, 这两个词都是及物动词，常用语adapt/adjust oneself to sth. , to 为介词;"变化了的环境"译为the changing environment.
2. 答案: you had showed more responsibility in your previous job.
详解:
考查虚拟语气: 本题是与过去事实相反的非真实条件句，所以从句用过去完成时，而主句谓语动词用would+have+过去分词。
考查固定搭配: "在...方面表现责任心"及"在先前的工作中"分别译为show responsibility in, in one's previous job.
3.答案: to have remained unconscious// to have been in a coma.
详解:
考查不定式: 空格前已有was said提示，因此“据说”要用sb. is said to do sth. 句型结构来表达。
考查时态: 句子的谓语动词使用一般过去时was said, "昏迷不醒"这个动作发生在谓语动词之前，故用完成时。不定式的完成时为to have+过去分词。
考查短语: “昏迷不醒”的表达为remain unconscious或be in a coma。
4. 答案: as often as you did at his age.
详解:
考查as...as引导的比较状语从句。
考查时态: 比较状语从句前后时态保持一致，主句用一般过去式，故此处的从句也用一般过去时。 空格中as引导的分句的谓语为前一分句的重现，故用助动词替代。
考查短语: “在...年纪”表达为at one's age.
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