why... is that..."，但不符合题干意义。

绿色通道：如何表达原因是本模块的重要内容。对于定语从句既要弄清楚其在从句中的成分也要从整个语言环境去把握。

例6 Don't all speak at once! _______,please.

A.Each at one time B.One by one time

C.One for each time D.One at a time

思路解析：本题考查与名词time搭配的短语的区别。at one time意思是"过去某段时间"；at a time 意思是"每次"。根据句意 "不要一起说，请一个一个地说",所以选择C。

例7I work in a business almost everyone is waiting for a great chance.

A.how B.which

C.where D.that

思路解析：本题考查的是关系副词引导定语从句的用法。根据"三三"原则，先行词a business应是"部门"之意，题意是"我在一家人人都期待大好机会的企业工作"，强调"地点"，所以选择C。

黑色陷阱：本题容易错选A项。这也是在关系副词引导定语从句中容易犯错误之处。当然目前中学生所学习的定语从句并不包括how作为关系词。

例8 The evening news comes on at seven o'clock and _______ only thirty minutes． 

A.keeps B.continues C.finishes D.lasts

思路解析：本题考查的是动词的辨析能力。句子空格之后是30 minutes，应填"持续"。整个句子表示"晚间新闻从7点开始，持续30分钟"。keep是指"持续某种状态"，finish是指"结束(后面跟时间点)"，continues是指"继续"，所以选择D。

例9He got to the station early, _______ missing his train.

A.in case of B.instead of C.for fear of D.in search of

思路解析：本题考查的是介词短语的区别。本题意思是"他早早到了车站，因为害怕误车"。而短语中，只有for fear of"害怕"符合题意。in case of 指"如果；假使"； instead of指"替代；尽管"；in search of指"搜查"，所以选择C。

　　志鸿原创题

　　阅读下列短文，根据短文内容填入适当的单词或短语。

　　A surprisingly high number of city citizens in China suffer from poor health and many die at an early age.

　　Poor health with no sign of any identified(确定的) disease ,a condition known in China as "sub health",is on the rise. Sub health is marked by general weakness ,low energy levels and a poor immune system.

　　A survey held in 16 cities with over 1 million population showed high proportions of urban Chinese have been suffering sub health problems.

　　The numbers are particularly high in Beijing ,Shanghai and Guangzhou ,with 75.31,73. 49,and 73.41 per cent respectively of residents in poor health ,the survey(调查) showed.

　　The problem happens mostly among senior and middle-level managers ,clerks and other white-collar workers with high education levels ,said the website of the Red Cross Society of China. 

　　"The sub health condition ,found in most cases among groups of people with a high educational level ,will have bad effects on China's long-term development and progress if not dealt timely and properly," the website warned.

A survey by the Chinese Academy of Sciences shows that the average life of Chinese