【题目】Most animals only have animals of a different kind for food. But sometimes two kinds of animals come together in a partnership (伙伴关系) which is good for them. You may have noticed some birds on the backs of sheep. This is not because they want a ride, but because they find easy food in the parasites (寄生虫) on sheep. The sheep let the birds do so because they can stop the parasites from troubling them. So though they can do with it by themselves, they can do better together with each other.

Sometimes an animal has a plant partner. The relationship develops until the two partners cannot do without each other. This is so in corals of the sea. Inside their bodies they have very small plants, which act as “cleaners”, taking the useless things from the coral and giving oxygen in return. That is what the animal needs to live. If the plants are killed, or are even kept from receiving light so that they cannot live as usual, the corals will die.

1Some birds like to sit on a sheep because ________.

A. they can eat its parasites B. they enjoy traveling with the sheep

C. they can’t live without its parasites D. they want to find the warm place

2The underlined(画下划线) word “they” in the first paragraph means _________.

A. birds and parasites B. birds and sheep

C. parasites and sheep D. birds, parasites and sheep

3We learn from the passage that corals need plants for _______.

A. friends B. light C. food D. oxygen

4What is the second paragraph mainly about?

A. Some animals and plants cannot live without each other.

B. Some animals and plants cannot develop their friendship easily.

C. Some plants eat each other.

D. Some animals live better together.

【题目】 Studying in the USA is very expensive. You need to spend $20,000 to $40,000 a year if you want to study in a university (大学) in the United States. In some universities, you may need to spend _________ money (over $40,000).

If you study in a university, you should also _________ money on renting () house, meals and so on. The rent of a _________ will be $500 per month. Other things like taking the bus or shopping may _________ $800 a month. If you didn’t take enough _________ from home, you need a full-time job to make money.

Many students work for long time to make money. If you start a full-time job, it is ______ that you will have to leave the university. It is even more _________ for undergraduate students (本科生). Graduate students (研究生) generally can manage (处理) well because they have fewer _________ to take. They can get work in their universities. However, universities _________ allow undergraduate students to do the work.

Students should not work out of school if the International Student Office doesn’t allow them to do it. Students can_________ at most 20 hours a week during term time and 40 hours during the holiday. If a student works longer, he or she may have to leave the university.

1A.lessB.moreC.higher

2A.loseB.findC.spend

3A.houseB.busC.school

4A.needB.produceC.include

5A.knowledgeB.clothesC.money

6A.importantB.possibleC.traditional

7A.interestingB.relaxingC.difficult

8A.classesB.jobsC.ways

9A.finallyB.hardlyC.probably

10A.sleepB.studyC.work

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