When you watch TV programs about wild animals, it is surprising to see how an antelope (羚羊) can run away from a strong lion. In the wilderness, everyone has his own way to protect himself. Even plants have their own ways to fight off enemies.

Over millions of years, plants have developed their own defense system (防卫系统). Chemicals are fantastically used by plants to survive (幸存). By making their leaves, flowers, roots and fruits poisonous (有毒的) to enemies, plants can fight back.

One such plant is the Golden Wattle tree. The British scientist David Cameron has found when an animal eats the tree’s leaves, the amount (数量) of poison increases in the other leaves. “It’s like the injured leaves telephoning the others to fight together against the enemy,” he said.

The tree also sends defense messages to neighboring plants by giving out a special smell. Golden Wattle trees in the nearby 45 meters will get the message and produce more poison within 10 minutes. Now, if an enemy eats too many of the trees’ leaves, he will die.

Every kind of plant or tree is good at producing a special set of chemicals. Herbivores, like rabbits, can safely eat the leaves of one tree, but they may be poisoned by its neighbor.

In this way, plants have not only developed their own defense system, but also shared it with others. This makes it impossible for a single animal to destroy even a small area of forest.

1.From the first 2 paragraphs, we can learn that _________.

A. plants can do nothing against their enemies

B. chemicals are quite useful for plants to survive

C. an antelope can always run away from a strong lion

D. leaves, roots, flowers and fruits of plants are poisonous

2.If animals eat one Golden Wattle tree’s leaves, the tree can________.

A. kill the animals with a special smell

B. tell other trees to come to protect it

C. warn other trees against the animals on the phone

D. send defense messages to the neighboring plants

3.The underlined word “herbivores” in the 5th paragraph probably means animals which _____.

A．produce poison                                     B．live on small animals

C．like to eat rabbits                                       D．feed on plants or grass

4.The last paragraph of the passage suggests that this kind of defense system is ________.

A．bad for animals                                        B．good for forests

C．helpful to some animals                        D．harmful to forests

5.The passage is mainly about __________.

A．the examples of protecting forests

B．the balance between animals and plants

C．the ways of plants fighting against enemies 

D．the relationship between lions and antelopes

阅读下面的短文，并完成短文后的任务。
Have you ever wondered why birds sing? Maybe you thought that they were just happy. After all, you probably also sing or whistle when you are happy.
Some scientists believe that birds do sing some of the time just because they are happy. However, they sing most of the time for a very different reason. Their singing is actually a warning to other birds to stay out of their territory.
Do you know what a “territory” is? A territory is an area that an animal, usually the male, claims（宣称）as its own. Only he and his family are welcome there. No other families of the same species（物种）are welcome. Your yard and house are your territory where only your family and friends are welcome. (76▲) If a stranger should enter your territory and want to hurt you, you might shout. Probably this would be enough to frighten him away.
If so, you have actually frightened the stranger away without having to fight him. (78▲)一只鸟也将会做同样的事. But he expects an outsider almost any time, especially at nesting （筑巢）season. So he is screaming（尖叫）all the time, whether he can see an outsider or not. This screaming is what we call a bird’s song, and it is usually enough to keep an outsider away.
Birds sing loudest in spring when they are trying to attract a mate（同伴）and warn others not to enter the territory of theirs.
You can see that birds have a language of their own. Most of it has to do with attracting mates and setting up territories.
【小题1】根据 (76) 处划线部分的意思来完成下面句子。（每空一词，共2词）
You might frighten a stranger away by _______ _______ him if he should enter your territory and want to hurt you.
【小题2】根据文章，给下列问题选择最佳选项。
What is a bird’s “territory”?  (       )

- Have you read the advertisement which ______ a reporter?
- Yes, I have.

Chinese Premier Wen Jiabao promised that the country would take actions to improve school bus safety on Sunday, a day after China saw its second terrible school bus accident in November, 2011.
“School buses should be safe mobile campuses(校园) for students,” the premier said at a national meeting on women and children, “Society(社会) should remember in mind that children should be the first to enjoy all kinds of social caring and the last ones to suffer from any disaster.”
School buses have become a hot topic in China since the deaths of 21 people, including 19 pre-school students, in a traffic accident between a truck and a school-owned minibus in Gansu province on Nov. 16, 2011. The nine-seat minibus was carrying 64 people at the time of the accident, according to the reports.
The second accident, in which a school bus in the northern province of Liaoning rolled over on Friday, left 35 people injured, according to China Daily.
“In recent days, a series of big accidents involving school buses has led to great anger among the people. These accidents have also made me uncomfortable,” said Mr Wang, an old teacher from Jiangsu. And he also thought that school bus safety must become a serious problem for schools and the government.
Premier Wen has already asked the government to develop new safety standard (标准) for school buses and made sure to help local government with safe buses for school-age children.
【小题1】How many seats did the minibus in Gansu province have before it was turned into a school bus?