一．完型填空（共20小题，每小题1.5分，满分30分）
Marriage is still a popular institution in the United States, but divorce(离婚) is becoming_1_as“popular”.Most American people get married, _2_,at the present time, and fifty percent of American marriages end _3_ divorce. However, four out of five divorced people do not _4_ single. They get married a second time to _5_ partners. Sociologists(社会学家)tell us that in the next century, _6_American people will marry three _7_ four times in one lifetime. Alvin Toffler, an American sociologist, _8_this new social form serial(连续
