题目内容
18.The time is not far away ______ fair national health service will be available to all Chinese people.( )A. | when | B. | as | C. | until | D. | before |
分析 将公平的国家卫生服务提供给所有中国人民的时间已不远了.
解答 答案A.本句是个主系表结构,the time是主语,is是系动词,表语是far away,而"______ fair national health service will be available to all Chinese people"是定语从句,来修饰先行词the time的.而until和before是从属连词,用来引导时间状语从句的,所以可排除C和D两项.关系代词as可用来定语从句,但是其用法是----as引导限制定语从句,用于以下3个结构中,as在从句中作主语、宾语或表语:so/such…as,the same…as和as…as;as引导非限制性定语从句,只代表主语或主句的一部分所表达的意思(不能指代某个名词或代词),可以放在主句前,后或中间,在从句中作主语或宾语---因此可排除B项.when引导定语从句时,其先行词是表示时间概念的名词,在定语从句中做时间状语,故答案选A.
点评 本题考查关系副词的用法.要分析句子成分,看缺少什么成分,就选用相应的关系词.where,why,when在句中分别做地点、原因和时间状语.
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