If people ________ cutting down the forest, they will have nowhere _______.A.keep, to

People can help solve the problem of pollution by______.

A. urging their governments to control litter and waste

B. cutting down the use of oil and other oil products

C. reducing unnecessary buying, over-consumption and careless disposal of wastes

D. making anti-pollution advertisements

Passage Four

The atmosphere and oceans are not the only parts of the environment being damaged. Rain forests are being quickly destroyed as well, and their survival is questionable. E. O. Wilson, a biologist at Harvard, calls the depletion(枯竭、耗尽)of rain forest areas "the greatest extinction since the end of the age of dinosaurs(恐龙)."

Unlike some environmental issues, rain forests' depletion has fortunately received significant public and media's attention. Despite the opposition to the cutting down of rain forests, the problem continues. Every year, Brazil chops down an area of forests the size of the state of Nebraska. In addition to the Amazon's rain forests, many other forests are being cut down as well.: In Indonesia, Zaire, Papua-new Guinea, Malaysia, Burme, the Philippines, Peru, Colombia, Bolivia, and Venezuela, rain forests that were once great have been lost.

According to some estimates, 50 million acres of rain forest are cut down every year. The United Nations says the figure is closer to 17 million acres. The World Wildlife Fund says that every minute,25 to 50 acres are cut down or burnt to the ground.

The world's growing population has been a primary reason of rain forests' destruction. More people need land to live on and wood products to consume. Limiting population growth may be the first in a series of steps that would alleviate the destruction of the rain forests.

48. In the opinion of the author, ______are being destroyed terribly at present.

A. the oceans

B. the atmosphere

C. the rain forests

D. all the above

From “Dreams of head-cutting!”(Paragraph 3), we learn that the writer.

A. was mad at the sales agent.

B. was reminded of the cruel pharaoh

C. wished that the sales agent would have had dreams.

D. dreamed of cutting the sales agent’s head that night.

Sometimes the processes in which people are engaged are dependent upon other processes being completed first, possibly by other people. For example, on an automobile(71), it is necessary for the body to be constructed before the doors can be added on. Attempting to add the doors first would be pointless, because there would be nowhere to attach them. Thus, if there is no body ready to have doors added, the process for adding doors has to be(72)until the process for creating the next body is complete. This is known as(73)

Obviously, there are many cases where people have to wait for other people to do something. However, if everyone in such a situation is waiting for someone else to do something first, then no one will ever be able to do anything. When discussing processes, this situation is known as(74), because all of the involved processes are effectively dead because of locks they have on resources. Usually someone in such a situation will eventually notice and abort the process, allowing normal flow to(75), and often warning signs can even be spotted ahead of time to avoid 'it in the first place.

A．water thread

B．assembly thread

C．water line

D．assembly line

The sentence" We have people. . . down the road" ( Line 4, Paragraph 2)probably means

[ A] we have people calling us for parking space two years ahead of time.

[ B] people called us for permission to use the places two years ago.

[ C] we received calls from people down the road two years ago.

[D] people called us for school vacancies two years in advance.

E

A rainforest is an area covered by tall trees with the total high rainfall spreading quite equally through the year and the temperature rarely dipping below l6℃．Rainforests have a great effect on the world environment because they can take in heat from the sun and adjust the climate．Without the forest cover，these areas would reflect more heat into the atmosphere，warming the rest of the world. Losing the rainforests may also influence wind and rainfall patterns，potentially causing certain natural disasters all over the world．

In the past hundred years，humans have begun destroying rainforests in search of three major resources(资源)：land for crops，wood for paper and other products，land for raising farm animals．This action affects the environment as a whole．For example，a lot of carbon dioxide (二氧化碳)in the air comes from burning the rainforests．People obviously have a need for the resources we gain from cutting trees but we will suffer much more than we will benefit.

There are two main reasons for this．Firstly，when people cut down trees，generally they can only use the land for a year or two．Secondly，cutting large sections of rainforests may provide a good supply of wood right now，but in the long run it actually reduces the world’s wood supply．

Rainforests are often called the world’s drug store．More than 25％ of the medicines we use today come from plants in rainforests．However，fewer than l％of rainforest plants have been examined for their medical value．It is extremely likely that our best chance to cure diseases lies somewhere in the world’s shrinking rainforests．

72．Rainforests can help to adjust the climate because they ．

A．reflect more heat into the atmosphere

B．bring about high rainfall throughout the world

C．rarely cause the temperature to drop lower than l6℃

D．reduce the effect of heat from the sun on the earth

Which the following statements is TRUE according to the passage?

A. The United Nations says about 50 million acres of rain forests are cut down every year.

B. Luckily people and the mass media all paid special attention to the depletion of rain forests.

C. The author thought the oceans' survival is questionable.

D. People have stopped cutting down rain forests because of the opposition of most people.

Why did Isaksen advise people not to have foreign pets?

A. They attack human beings.

B. We need to study native animals.

C. They can’t live out of the rain forest.

D. We do not know much about them yet.

A.concerned

B.compatible

C.considerate

D.complied

A. to use gloves to pick up the item.

B. to squat and lift from the legs.

C. to have two people bend down and pick the item up.

D. to bend down and lift the item up.