1. Passage Thirteen Trees are useful to man in three important ways: they provide him with wood and other products; they give him shade; and they help to prevent droughts and floods. Unfortunately， in many parts of the world， man has not realized that the third of these services is the most important. In his eagerness to make money from trees， he has cut them down in large numbers， only to find that without them he has lost the best friends he had. And besides， he is usually too careless to plant and look after new trees. So the forests slowly disappear. This does not only mean that man will have fewer trees. The results are even more serious: for where there are trees， their roots break up soil——allowing the rain to sink in——and also bind the soil， thus preventing it from being washed away easily; but where there are no trees， the rain falls on hard ground and flows away， causing floods and carrying away the rich top-soil. When all the top-soil is gone， nothing remains but worthless desert. Two thousand years ago a rich and powerful country cut down its trees to build warships， with which to gain itself an empire. It set up the empire but， without its trees， its soil became poor and it grew weak. When the empire fell to pieces， the home country found itself faced with floods and starvation. What is the most important service of trees to man according to the passage?

34. By the time we got to the cinema the film (_____)_ for half an hour.

A. 　 has begun

B. 　 had begun

C. 　 has been on

D. 　 had been on

49. They had to put (_____) the meeting due to the ongoing COVID-19.

A. 　 forward

B. 　 up

C. 　 down

D. 　 off

32.His scientific discoveries have been as important as (_____)_ of Sir Isaac Newton.

A. 　 ones

B. 　 that

C. 　 those

D. 　 these

39. Lessons (_____)_ easily were soon forgotten.

A. 　 to learn

B. 　 learn

C. 　 learned

D. 　 learning

2. Passage Nine Today anyone will accept money in exchange for goods and services. People use money to buy food， furniture， books， bicycles and hundreds of others they need or want. When they work， they usually get paid in money. Most of the money today is made of metal or paper. But people used to use all kinds of things as money. One of the first kinds of money was shells. Shells were not the only things used as money. In China， cloth and knives were used. In the Philippine Islands， rice was used as money. In some parts of Africa， cattle were one of the earliest kinds of money. Other animals were used as money， too. The first metal coins were made in China. They were round and had a square hole in the center. People strung them together and carried them from place to place. Different countries have used different metals and designs for their money. The first coins in England were made of tin. Sweden and Russia used copper to make their money. Later， other countries began to make coins of gold and silver. But even gold and silver were inconvenient if you had to buy something expensive. Again， the Chinese thought of a way to improve money. They began to use paper money. The first paper money looked more like a note from one person to another than paper money used today. Money has had an interesting history from the days of shell money until today. Where were shells used as money in history?

A. In the Philippines.

B. In China.

C. In Africa.

D. We don’t know.

4. Passage Fifteen Big data can be defined as information that is too big or complex to be contained or processed by any one machine or person. As a student at the University of Sussex， Julian Dailly had two majors——English and philosophy. When he completed his studies， Dailly wondered how he would ever earn a living in a world filled with machines and technology. Now， he is part of the big data industry that includes Google and Facebook. Dailly’s research company， Morar Consulting， started three years ago with five employees. The company’s earnings have increased by 25% each year. It now employs 90 people. “What we do here is we try to discover what’s meaningful for people and link that to their economic behavior，” Dailly said. He noted the importance of working with people with different skills. “We have people from traditional research backgrounds， in addition to some in social sciences， economics， people from tech backgrounds， and salespeople，” Dailly said. Companies like Dailly’s employ recent college graduates. The industry profits from the ideas of these young men and women. New forms of data also make it possible for some observers to predict the future. They are more valuable to companies than the traditional forms of data recording or reporting. “We have access to the core information inside people’s heads，” Dailly said， “They tell you what people are going to do as opposed to what they’ve done. That helps people take proper action in advance. This makes it much more useful for strategy.” Julian Dailly dismisses concerns that computers have finally taken control of our daily lives. “Some may worry that humans will be allowed to be replaced by machines. I think it’s a fantasy.” The company is aimed at making use of the information to help people ( ) .

A. take predictive action

B. remember the past

C. learn from each other

D. stick to the tradition

4. Passage Twelve What are the differences between public and private in American higher education? A big difference involves money. Public colleges and universities charger for an education just like private schools. But state schools cost less because they get money from the states that started them to educate local citizens. As a result， out-of-state and international students usually pay more than state residents， at least the first year. The state with the most residents， almost forty million， is California. Its systems of two-year and four-year colleges and universities are among the largest in the world. But the example we are going to focus on today is to the north of California， in a much smaller state on the West Coast: Oregon. The University of Oregon， located in Eugene， is one of the campuses in the Oregon University System. The cost for undergraduates this year is $6，000 for state residents. Housing is an additional $8，000. Non-residents pay the same for housing——but almost $20，000 for tuition and fees. Let’s see how these numbers compare to a private college in Oregon. Lewis and Clark College in Portland has 4，000 students， compared to 20，000 at the University of Oregon. Housing costs $800 more than at the state school. But the big difference is tuition. The published price at Lewis and Clark is almost $34，000. Yet Lewis and Clark is one of the few American colleges to offer financial aid for international students. Each year it awards financial aid to twenty students from other countries. And it says the average award last year was 19，000 dollars. That would make Lewis and Clark cheaper for international students than the University of Oregon. But， of course， prices alone do not say anything about the quality of a school or the value of an education. The costs of tuition and housing in Lewis and Clark College are ( ) .

A. both more expensive than in the University of Oregon

B. cheaper for foreign students than in the University of Oregon

C. the same as that in the University of Oregon

D. cheaper than those of the University of Oregon for the state residents

48. The company isn't (_____)____doing such big business.

A. 　 able to

B. 　 capable to

C. 　 able of

D. 　 capable of

31. In the densely() part of the country, the problem of air pollution must be solved.

A. 　 populous

B. 　 population

C. 　 popular

D. 　 populated

40. Theory is based on practice and (_____)_ serves practice.

A. 　 in turn

B. 　 in tone

C. 　 in return

D. 　 in practice