54. Life on Mars will be better than life on the earth because ___________ .

   A. only a few people will live there        B. there will be more space and less work to do

   C. there will be much delicious food       D. all students don’t need to do any homework

53. So far, how long will it take us from the earth to Mars by spaceship ?

   A. Two or three days.               B. A few weeks.

   C. A few months.                  D. A few years.

52. According to the text, by the year 2100, some of us will possibly live __________ .

   A. on Mars        B. on the moon            C. under the sea         D. in the sun

51. Which of the following is NOT mentioned in the passage?

   A. Some traditional teachers do not like open education.

   B. Many teachers do not believe in open education

   C. Teachers may have problems in open classrooms.

   D. Teachers’ feeling and attitudes (态度) are important to students

C

   At the moment, it may be difficult to imagine, but many people believe that, by the year 2100, we will live on the planet Mars. Our own planet, Earth, is becoming more and more crowded and polluted. Luckily, we can start again and build a better world on Mars. Here is what life could be like.

   First of all, transport should be much better. At present, our spaceships are too slow to carry large numbers of people to Mars ― it takes months. However, by 2100, spaceship can travel at half the speed of light. It might take us two or three days to get to Mars!

   Secondly, humans need food, water and air to live. Scientists should be able to develop plants that can be grown on Mars. These plants will produce the food and air that we need. However, can these plants produce water for us? There is no answer now.

   There is a problem for us to live on Mars. Mars sucks us much less than the Earth does. This will be dangerous because we could easily jump too high and fly slowly away into space. To prevent this, humans on Mars have to wear special shoes to make themselves heavier.

   Life on Mars will be better than that on Earth in many ways, People will have more space. Living in a large building with only 10 bedrooms is highly possible. Many people believe that robot will do most of our work, so we have more time for our hobbies.

   There will probably be no school on Mars. Every student will have a computer at home which is connected to the internet. They can study, do their homework and take exams in online schools. Each student will also have their own online teacher called “e-teacher”.

   However, in some ways, life on Mars may not be better than that on the earth today. Food will not be the same ― meals will probably be in the form of pills and will not be as delicious as they are today, Also, space travel will make many people feel ill. The spaceship will travel fast but the journey to Mars will probably be very uncomfortable.

50. Some students will do little in an open classroom because ______.

   A. there are too few rules              B. they hate activities

   C. open education is meaningless        D. they worry about the rules

49. Open education may be a good idea for the students who ______.

   A. enjoy traditional learning            B. worry about grades or rules

   C. do well in a traditional classroom      D. are responsible for what they do

48. Open education allows the students to ______.

   A. be late for school                   B. be responsible for their future

    C. develop their own interests          D. discover subjects outside class

47. If both parents are blood type AB, then their children can NOT be ________.

   A. blood type O   B. blood type B     C. blood type AB       D. blood type A

B

   There are some very good things about open education. This way of teaching allows the students to grow as people, and to develop their own interests in many subjects. Open education allows students to be responsible for their own education, as they are responsible for what they do in life. Some students do badly in a traditional classroom. The open classroom may allow them to enjoy learning. Some students will be happier in an open education school. They will not worry about grades or rules. For students who worry about these things a lot, it is a good idea to be in an open classroom.

   But many students will not do well in an open classroom. For some students, there are too few rules. These students will do little in school. They will not make good use of open education. Because open education is so different from traditional education, these students may have a problem getting used to making so many choices . For many students it is important to have some rules in the classroom. They worry about the rules even when there are no rules. Even a few rules will help this kind of students.

   The last point about open education is that some traditional teachers do not like it. Many teachers do not believe in open education. Teachers who want to have an open classroom may have many problems at their schools.

46. If a father is blood type A and a mother is blood type B, then their children’s blood type is ___.

   A. blood type A   B. blood type B     C. blood type O        D. any blood type

45. How many blood types do humans have?

   A. One.         B. Two.           C. Three.             D. Four.