题目内容
17．________，they weren't able to save the life of Yao Beina，a popular singer．（ ）| A． | As doctors tried hard | B． | Hard did doctors try | ||
| C． | Though doctors try hard | D． | Hard as doctors tried |
分析 句意为：医生们虽然努力尝试了，但他们还是不能拯救姚贝娜的生命，一个受欢迎的歌手．
解答 答案：D 本题考查as表示"虽然"意思时的倒装结构．as/though引导的让步从句须将表语或状语提前（形容词，副词，分词，实义动词提前），再接as或though，后面跟上其他剩余内容（不需要添加其他助动词）．A项中没有倒装，B项中did提前是错误的，C项时态不正确，所以选择D．
点评 as引导让步状语从句时意思是"虽然虽然，尽管"．as作此用法意时，常与though，although比较．as 引导的让步状语从句，必须倒装，把名词（省略冠词）、作表语的形容词、副词或动词原形放在句首，后接as和其他内容．as还可以引导其他的状语从句．
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