呵呵Ⅲ.标出主题句（15 points,5 points each）16.Choose the best topic s

呵呵
Ⅲ.标出主题句（15 points,5 points each）
16.Choose the best topic sentence from the group below.Write the choice in the blank.
A.The most critical election happened in 1896.
B.The Great Depression produced conditions for 1932 election.
C.Abraham Lincoln won the election of 1860 and became the 16th American president.
D.America’s two-party system has experienced three critical elections,each of which affected the party balance in government.
Answer:______________________________________________________
17.Read the following paragraph and underline the topic sentence.
A family group is a good example for illustrating norms,roles,status positions,and social structure.Charlie has certain expectations for Alice that have developed between them over time.Alice is his wife,and he expects her to have the primary responsibility for childrearing and for dealing with relatives.She is expected to listen to his complaints about his boss,to give him encouragement concerning his professional life,to be nice to his friends,to be patient with his impatience,and to spend the family funds carefully.Alice,on the other hand,expects Charlie,her husband,to share in housework,to prepare the meals,to play with the children,to listen to her complaints about her boss,to encourage her to pursue her professional growth,and to know what to do in a weather emergency or when the plumbing breaks down.
18.Read the following paragraph carefully and select the best topic sentence from the four possible answers that follow the paragraph.Write the choice in the blank.
Topic Sentence:______________________________________________________
Until the early 1960s,most people reported getting more news from newspapers than from any other source By the mid-1960s,television nudged(轻推)out newspapers as the public’s major source of news.By the 1980s,about two-thirds of the public cited television as their news source,compared with less than one-half who named newspapers and less than one-fifth who relied on radio.Not only is television the public’s most important source of news now,but television news is also rated as more trustworthy than newspaper news—by a margin of more than 2 to 1.
A.Virtually all citizens rely on the mass media for news.
B.Only a very small number of the public relied on the radio for news.
C.The public got news mainly from newspapers before the early 1960s.
D.Television now has become the most popular and trustworthy source of news.

16.D选项为主题句,“美国的两党制政体经历了三次关键选举,每一次都影响了政府的党派平衡” 该句更具宏观性,另起下文,下面用三次选举分别阐述,可以从ABC选项三个时间点看出.
17.首句为主题句.一般而言段落的主题句为首句或者尾句,以前者居多,所对应的段落结构分别为总分式和分总式,当然也有中心句为极少数首尾句综合的情况或者在段中的情况.本段中,首句译为“家庭群体是说明规范、角色、地位和社会结构的很好的例证.”这句点明本段中心,领起下文.下文分别讲述Charles和Alice夫妇对对方的期待来作为论据证明论点.
18.D选项为主题句.本段前三句表述上体现一种时间上的前后相继,阐述了媒体的发展和人们获得新闻的媒体方式的变化.最后一句收束全段,得出电视目前成为公众获得新闻的最重要、最可信的方式,强调重点是电视在传媒方面的重要性,观察选项唯有D体现了这一点.