结构推理 Directions: Read the following passage carefully and give brief answers to the questions. Questions 168 to 172 are based on the following passage. The decline of fatherhood is one of the most unexpected and unusual social trends of our time. In just three decades -- 1960 to 1990 -- the percentage of children living apart from their biological fathers roughly doubled to 36 percent. By the turn of the century nearly 50 percent of American children may be going to sleep each evening without being able to say good-night to their dads. There was a time in the past when fatherlessness was far more common than it is today, but death was to blame -- not divorce, desertion or births outside of marriage. Most of today’s fatherless children have fathers who are perfectly capable of shouldering the responsibilities of fatherhooD、Who would ever have thought that so many of them would choose to escape those responsibilities? that it is much worse for a child to lose a father in the modern, chosen way than through death. The children of divorced and never-married mothers are less successful by almost every measure than the children of widowed mothers. Births outside of marriage are expected to go beyond divorce as a cause of fatherlessness later in the 1990s. They account for 32 percent of all births in 1997; by the year 2002 they may account for 40 percent of the total. Also, there is reason to believe that having an unmarried father is even worse for a child than having a divorced father. 1. In the 1960s, the number of children living away from their biological fathers was about _ _____________________. 2. Fatherlessness was once very common in history. It resulted from _____________. 3. The last paragraph but one suggests that the children living apart from their biological fathers ____________________. 4. According to the passage, what accounts for the fatherlessness today? 5. What is the writer's prediction about the problem of fatherlessness?