The green turtle is listed as endangered by the International Union for the Conservation of Nature. Under the U.S. Endangered Species Act of 1973, the green turtle was listed as threatened except for the breeding populations in Florida and on the Pacific coast of Mexico, where it is listed as endangered. Green turtles continue to be caught for money by humans, and the destruction and loss of nesting and foraging sites is a serious problem. Humans have already caused the decrease of large green turtle populations, including those that once nested in Bermuda and Cayman Islands. The situation of green turtle populations is difficult to determine because of our lack of knowledge about their life cycles. The number of nests in Florida appears to be increasing, but we don't know whether this is due to an increase in the number of nests or because we have started to monitor nesting beaches more closely. The green turtle is the largest hardshelled sea turtle. Adults of this species commonly reach 100 cm in length and 150 kg in mass. The average size of a female nesting in Florida is 101.5 cm straight in length, with an average body mass of 136 kg. Growth rates of green turtles have not been measured under natural conditions. Green turtles grow slowly. In the southern Bahamas, green turtles grow from 30 to 75 cm in 17 years, and according to Bjorndal and Bolten, growth rates decrease with increasing length. Growth rates measured in green turtles from Florida and Puerto Rico fall within the range of growth rates measured in the southern Bahamas. Based on growth rate studies of wild green turtles, the researchers Balazs, Frazer and Ehrhart estimate the age of sexual maturity can range anywhere from 20 to 50 years. Why is it hard for us to know the number of green turtles? A) Because it is difficult for us to be close to them. B) Because we have limited knowledge about them. C) Because we haven't measured their growth rates. D) Because they grow too slowly.
B
The greatest recent social changes have been in the lives of women. During the twentieth century there has been a remarkable shortening of the proportion of a woman's life spent in caring for the children. A woman marrying at the end of the nineteenth century would probably have been in her middle twenties, and would be likely to have seven or eight children, four or five of whom lived till they were five years old. By the time the youngest was fifteen, the mother would have been in her early fifties and would expect to live a further twenty years, during which health made it unusual for her to get paid work. Today women marry younger and have fewer children. Usually a woman's youngest child will be fifteen when she is forty-five years and can be expected to live another thirty-five years and is likely to take paid work until retirement at sixty. Even while she has to take care of children, her work is lightened by modern living conditions. This important change in women's life-patterns has only recently begun to have its full effect on women's economic position. Even a few years ago most girls took a full-time job after they left school. However, when they married, they usually left work at once and never returned to it. Today the school- leaving age is sixteen; many girls stay at school after that age, and though women usually marry older, more married women stay at work at least until shortly before their first child is born. Many more afterwards return to full-or-part-time work. Such changes have led to a new relationship in marriage, with the husband accepting a greater share of the duties and satisfactions of family life, and with both husband and wife sharing more equally in providing the money, and running the home, according to the abilities and interests of each of them. When she was over fifty, a late nineteenth-century mother _ . A) was usually expected to die fairly soon B) would expect to work until she died C) would be healthy enough to take up paid jobs D) was less likely to find a job even if she wanted to
D
Q: I had the meanest mother in the world.While other kids ate candy for breakfast.I had to have cereal, eggs and toast.Others had cakes and candy for lunch, while we had to eat a sandwich.As you can guess, my supper was different from the other kids'.But at least I was not alone in my suffering.My sister and two brothers had the same mean mother as I did. My mother insisted on knowing where we were at all times.She had to know who our friends were and what we were doing.We had to wear clean clothes every day.Other kids always wore their clothes for days. We reached the height of disgrace because she made our clothes herself, just to save money. The worst is yet to come.We had to be in bed by 9:00 each night and up at 7:45 the next morning.So while my friends slept, my mother actually had the courage to break Child Labor Law.She made us work. I believed she lay awake all night thinking up mean things to do to us.Through the years, our friends' report cards had beautiful colors on them, black for passing, red for failing.My mother, however, would only be satisfied with black marks.None of us was allowed the pleasure of being a dropout . She forced us to grow up into educated and honest adults.Using this as a background, I'm now trying to bring up my three children.I'm filled with pride when my children think I am mean because now I thank God every day for giving me the meanest mother in the world. Which of the following statements is NOT true according to the passage? A) The writer is very thankful to her mother. B) The writer has a deep hatred for her mother. C) Mother practiced economy in running her home. D) The writer is strict with her children when bringing them up.
A: B
Be positive about school! Don't say things are difficult or boring. Be interested in school life and your school subjects. Join lots of activities. Be quick to put your hand up. Go round the school with a big smile. Expect to work. School is not a holiday camp. If you are not working, you are not learning, and you are wasting your time at school. Teachers cannot make everything enjoyable. Keep fit. If you do not eat a good breakfast, you will be thinking about food in class. If you go to bed late and do not have enough sleep, you will be sleepy in class. Play some sports to keep your body strong. Don't be too disappointed if things sometimes go badly. Everyone _ some tests, lose some matches and has bad days. Friends are not always perfect, and they sometimes say and do unpleasant things. Don't let small problems seem very big and important. Talk about problems. Sometimes they are only the result of misunderstanding. Don't be too embarrassed to ask for help. You are young. No one thinks you can do everything. If you do not eat a good breakfast, you will _ A) be angry B) not pay attention to your study. C) be tired D) be punished
B