while
yet
though
and then
第1题：
第2题：
There have been（）periods in the development of American political parties in the United States.
Afour
Bthree
Cfive
Dtwo
第3题：
A.on
B.for
C.of
D.to
第4题：
be taking place
take place
be taken place
have taken place
第5题：
Shopping habits in the United States have changed greatly in the last quarter of the 20th century. （1） in the 1900s most American towns and cities had a Main Street. Main Street was always in the heart of a town. This street was （2） on both sides with many （3） businesses. Here, shoppers walked into stores to look at all sorts of merchandise: clothing, furniture, hardware, groceries. （4）,some shops offered （5） .These shops included drugstores, restaurants, shoe-repair stores, and barber or hairdressing shops. （6） in the 1950s, a change began to （7） .Too many automobiles had crowded into Main Street （8） too few parking places were （9） shoppers. Because the streets were crowded, merchants began to look with interest at the open spaces （10） the city limits. Open space is what their car-driving customers needed. And open space is what they got （11） the first shopping centre was built. Shopping centres, or rather malls, （12） as a collection of small new stores （13） crowded city centres. 14 by hundreds of free parking space, customers were drawn away from （14） areas to outlying malls. And the growing （16） of shopping centres led （17） to the building of bigger and betterstocked stores. （18） the late 1970s,many shopping malls had almost developed into small cities themselves. In addition to providing the （19） of one stop shopping, malls were transformed into landscaped parks, （20）benches, fountains, and outdoor entertainment. 请在7处填上正确答案（）
第6题：
The consequence of the three neutrality acts of the United States was（）
Ato make the United States gain time to arm itself
Bto actually help the aggressors by making clear that the United States would not intervene
Cto get the United States involved in the war
Dto prevent the United States form being dragged into the war
第7题：
The consequence of the three neutrality acts of the United States was（）
第8题：
Working hours in the United States ____________over the past 20 years.
A. have increased
B. increased
C. were increasing
D. have been increased
第9题：
four
three
five
two
第10题：
12.
13.
14.
15.