题目内容
The long-lost watch ________ down the back of the old chair.
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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 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.
【小题1】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 |
| A.We will lose much more than we can gain. |
| B.Humans have begun destroying rainforests. |
| C.People have a strong desire for resources. |
| D.Much carbon dioxide comes from burning rainforests. |
| A.we can get enough resources without rainforests |
| B.there is great medicine potential in rainforests |
| C.we will grow fewer kinds of crops in the gained land |
| D.the level of annual rainfall affects wind patterns |
| A.Losing the rainforests has caused natural disasters all over the world. |
| B.Cutting rainforests will help increase the world’s wood supply in the future. |
| C.Rainforests can’t provide medical cures for diseases at all |
| D.Rainforests helps to control the temperature and adjust climate for humans. |
| A.How to Save Rainforests |
| B.How to Protect Nature |
| C.Rainforests and the Environment |
| D.Rainforests and Medical Development |
In Washington D.C., 1600 Pennsylvania Avenue is a very special address. It is the address of the White House, the home of the president of the United States.
Originally the White House was gray and was called the presidential Palace. It was built from 1792 to 1800. At this time, the city of Washington itself was being built. It was to be the nation’s new capital city. George Washington, the first president, and Pierre Charles L'Enfant, a French engineer, chose the place for the new city. L'Enfant then planned the city. The president's home was an important part of the plan.
A contest was held to pick a design for the president's home. An architect named James Hoban won. He designed a large three-story house of gray stone.
President Washington never lived in the Presidential Palace. The first president to live there was John Adams, the second president of the United States, and his wife Mrs.Adams did not really like her new house. In her letters, she often complained about the cold. Fifty fireplaces were not enough to keep the house warm.
In 1812 the United States and Britain went to war. In 1814 the British invaded Washington. They burned many buildings, including the Presidential Palace.
After the war James Hoban, the original architect, partially rebuilt the president’s home. To cover the marks of the fire, the building was painted white. Before long it became known as the White House.
The White House is one of the most popular tourist attractions in the United States. Every year more than 1.5 million visitors go through the five rooms that are open to the public.
【小题1】The White House was built in Washington_____.
| A.because a French engineer was invited to design it |
| B.because President George Washington liked to live in it |
| C.because the British invaders lived in it in1812-1814 |
| D.because it was to be the nation’s capital city |
| A.built by the American army | B.built by the British troops |
| C.planed by George Washington | D.planned by the French |
| A.because John Adams’ wife did not like it |
| B.because it was cold in winter even with 50 fireplace |
| C.because it had been burned down during the war |
| D.because George Washington was not willing to live in it |
A. cover the marks of fire B. attract tourist from France
D. to please Mrs. John Adams D. keep it warm in winter