单选题 The northern parts of the United States get very cold in the winter. It snows a great deal and the temperature often goes (21) zero degree in January, (22) and March. But the northeastern and northcentral regions of (23) have been financial and industrial centers, and they are heavily polluted.
In recent years, people in these regions have begun to take vacations (24) these cold winter months. They go to southern parts of the country (25) it is warmer. Many go to Florida where the weather is (26) . Others go to the western states of Arizona, New Mexico and Texas where they (27) dry desert climates.
I has become (28) nowadays for old people to move south to these places (29) they retire. Typically these people sell their houses in their home communities and move south to begin a new life (30) senior citizens.
Their children likely have homes (31) and many of them move south (32) communities where they were (33) . The southern and southwestern parts of the country are now growing (34) any other part. Business and industry (35) many offices and factories in the south. California is already the most popular state in the country.

单选题 A. below B. above C. near D. over
【正确答案】 A
【答案解析】[解析] 联系上下文可知寒冷程度很高，用below表示“低于零度”。
单选题 A. April B. May C. February D. June
【正确答案】 C
【答案解析】[解析] 空格前是“一月”，空格后是“三月”，它们之间又是并列关系，应选February“二月”。
单选题 A. the town B. the country C. the city D. the state
【正确答案】 B
【答案解析】[解析] 短文前面说的是美国北部地区气候寒冷，题干大意：______的东北部地区和北部中央地区……。无疑应选the country，指代美国。
单选题 A. among B. toward C. during D. before
【正确答案】 C
【答案解析】[解析] 由于空格后是months，表示的是较长的一个时间段，所以选介词during，表示“在……期间”。介词among和toward不用于指时间，before用于某个时间点之前。
单选题 A. where B. when C. which D. that
【正确答案】 A
【答案解析】[解析] 这是一个用关系副词where引导的限定性定语从句，修饰先行词southern parts。
单选题 A. typical B. usual C. tropical D. practical
【正确答案】 C
【答案解析】[解析] 通过常识可推断，佛罗里达的天气属于热带(tropical)气候。
单选题 A. get rid of B. look for C. search for D. find
【正确答案】 D
【答案解析】[解析] 动词find指“找到”，其余三项都不合题意。get rid of指“摆脱”；look for指“寻找”；search for指“搜寻”。
单选题 A. strange B. traditional C. common D. rare
【正确答案】 C
【答案解析】[解析] 形容词common表示“普遍的”，指“现在老人去南部很普遍”。
单选题 A. when B. where C. unless D. though
【正确答案】 A
【答案解析】[解析] 这是一个连词when引导的时间状语从句。
单选题 A. for B. as C. to D. toward
【正确答案】 B
【答案解析】[解析] 介词词组as senior citizens表示“作为老人”。
单选题 A. of their B. of their own C. for theirs D. for their own' s
【正确答案】 B
【答案解析】[解析] 介词词组of one's own表示“某人自己的”。
单选题 A. nearest B. among C. away from D. far to
【正确答案】 C
【答案解析】[解析] 短语away from表示“离……远”。该句前面说他们搬到南方去，既然是搬家，那就肯定是“远离”自己原来生活的地方。
单选题 A. born B. raised C. lost D. found
【正确答案】 A
【答案解析】[解析] 短语be born表示“出生”。
单选题 A. less than B. as fast as C. as slow as D. faster than
【正确答案】 B
【答案解析】[解析] 根据下文内容可以看出美国南部和西南部由于上文所述的一些原因而发展得很快(as fast as)。
单选题 A. have opened B. closed C. rebuilt D. set up
【正确答案】 D
【答案解析】[解析] 短语set up表示“建立”。