In sport the sexes are separate. Women and men do not run or swim in the same races.

　　Women are less strong than men. That at least is what people say. Women are called "the weaker sex", or, if men want to please them, "the fair sex". But boys and girls are taught together at schools and universities. There are women who are famous Prime Ministers, scientists and writers .And women live longer than men. A European woman can expect to live until the age of 74, a man only until he is 68. Are women' s bodies really weaker?

　　The fastest men can run a mile in 4 minutes. The best women need 4.5 minutes. Women's speeds are always slower than men' s, but some facts are surprising. Some of the fastest women swimmers today are teenage girls. One of them swam 400 metres in 4 minutes 21.2 seconds when she was only 16. The first "Tarzan" in films was an Olympic swimmer, Johnny Weissmuller. His fastest 400 metres was 4 minutes 59.1 seconds, which is 37.9 seconds slower than a girl 50 years later! This does not mean that women are catching men up. Conditions are very different now, and sport is much more serious. It is so serious that some women athletes are given hormone(荷尔蒙) injections. At the Olympics a doctor has to check whether the women athletes are really women or not. It seems sad that sport has such problem. Life can be very complicated when there are two separate sexes!

　　21.Women are called "the weaker sex" because __________.

　　A.women do as much work as men

　　B.people think women are weaker than men

　　C.sport is easier for men than for women

　　D.in sport the two sexes are always together

　　答案：B

　　22.Which of the following is true?

　　A.Boys and girls study separately everywhere.

　　B.Women do not run or swim in races with men.

　　C.Famous Prime Ministers are women.

　　D.Men can expect to live longer than women in Europe.

　　答案：B

　　23."That at least is what people say." means people __________.

　　A.say other things too

　　B.don't say this much

　　C.say this but may not think so

　　D.only think this

　　答案：C

　　24. What problems does sport have? __________.

　　A.Some women athletes are actually men.

　　B.Some women athletes are given hormone injections.

　　C.Women and men do not run or swim in the same races.

　　D.It is difficult to check whether women athletes are really women.

　　答案：B

　　25.In this passage the author implies that __________.

　　A.women are weaker than men, but faster

　　B.women are slower than men, but stronger

　　C.men are not always stronger and faster than women

　　D.men are faster and stronger than women

　　答案：C

　　All the useful energy at the surface of the earth comes fromthe activity of the sun. The sun heats and feeds creatures and mankind. Eachyear it provides men with two hundred million tons of grain and nearly tenmillion tons of wood, coal, oil, natural gas, and all other fuels are stored energyfrom the sun. Some was collected by this season’s plants as carbon compounds.Some was stored by plants and trees ages ago. Even waterpower derives from thesun. Water turned into vapor by the sun fails as rain. It courses down themountains and is converted to electric power. Light transmits only the energythat comes from the sun’s outer layer, and much of this energy that is directedtowards the earth never arrives. About nine tenths of it is absorbed by theatmosphere of the earth. In fact, the earth itself gets only one half millionthof the sun's entire output of radiant energy.

　　26.The sun is the source of all of the following EXCEPT ________

　　A.gasoline

　　B.natural gas

　　C.atomic power

　　D.animal fat

　　答案：C

　　27.Radiant energy is stored as carbon compounds by________

　　A. Plants

　　B.water

　　C.rock

　　D.creatures

　　答案：A

　　28.The sun’s energy provides us with all EXCEPT________

　　A.rain

　　B.Teal

　　C.Water

　　D.light

　　答案：B

　　29.The largest part ofthe light energy directed towards the earth is________

　　A.stored up by the plants

　　B.absorbed by the earth’s atmosphere

　　C.stored up by the animals in the form of body fat

　　D.used for electric power

　　答案：B

　　30.Of the sun’s total output of radiant energy, the earthreceives________

　　A.one tenth

　　B.one millionth

　　C.all that comes from the surface of the sun

　　D.a very small portion

　　答案：D