Choose the words or expressions and complete the passage (选择最恰当的单词或词语，完成短文)
1．We have always been warned of the dangers of the forest fires. They cause     1   to a forest. They kill many plants and animals in an eco-system, which is a group of living things and their environment. But have you ever heard of a forest fire that can be     2    for a forest?
2．People start some of the fires with special reasons to actually do well to the eco-system.
3．In fact, fires are a natural part of any eco-system. Without fires, the oldest and largest trees would stop sunlight from reaching the forest floor. Fires can       3      some of these old trees. When the trees die, they provide something good for the earth. New trees can grow strong and healthy in their place.
4．Some trees even need fires to grow. These trees hold their seeds(种子) inside. Heats from a fire allow the coat of the seeds to open up. Then the seeds fall to the ground and have the 4 to grow.
5．Scientists, who know about nature’s needs, start some of these fires, called controlled burns. A fire is started and kept under control. This way, the fire does not spread out of the area or 5   a large space of the forest. Fires can be dangerous for animals. Even when animals continue to live after forest fires, they can go hungry   6    their food has been damaged in the fire. Small, controlled fires mean that animals will not have to move far to find food. After some time, small plants begin to grow. Animals return soon after the plants return. This   7 makes an eco-system.
6．So the next time you hear about a forest fire, think about the good as well as the bad. It may take a new eco-system a while to return, but it will likely come back stronger and healthier than ever.

1Choose the words or expressions and complete the passage (选择最恰当的单词或词语，完成短文)

1．We have always been warned of the dangers of the forest fires. They cause     1    to a forest. They kill many plants and animals in an eco-system, which is a group of living things and their environment. But have you ever heard of a forest fire that can be     2     for a forest?

2．People start some of the fires with special reasons to actually do well to the eco-system.

3．In fact, fires are a natural part of any eco-system. Without fires, the oldest and largest trees would stop sunlight from reaching the forest floor. Fires can       3       some of these old trees. When the trees die, they provide something good for the earth. New trees can grow strong and healthy in their place.

4．Some trees even need fires to grow. These trees hold their seeds(种子) inside. Heats from a fire allow the coat of the seeds to open up. Then the seeds fall to the ground and have the 4 to grow.

5．Scientists, who know about nature’s needs, start some of these fires, called controlled burns. A fire is started and kept under control. This way, the fire does not spread out of the area or 5    a large space of the forest. Fires can be dangerous for animals. Even when animals continue to live after forest fires, they can go hungry   6     their food has been damaged in the fire. Small, controlled fires mean that animals will not have to move far to find food. After some time, small plants begin to grow. Animals return soon after the plants return. This   7  makes an eco-system.

6．So the next time you hear about a forest fire, think about the good as well as the bad. It may take a new eco-system a while to return, but it will likely come back stronger and healthier than ever.

1.A. illness            B. difficulty       C. damage      D. flood

2.A. helpful            B. powerful         C. harmful     D. awful

3.A. take the place of  B. get ready for    C. be bad for  D. get rid of

4.A. time               B. water            C. chance      D. skill

5.A. discover           B. cover            C. but         D. waste

6.A. because            B. although         C. but         D. so

7.A. almost             B. again            C. never       D. even

It is hard to know when an earthquake(地震) is going to come. There is no easy way to __1__ what place will be in danger next. Some places __2__ earthquakes very often, such as Alaska in the USA. __3__ have a large earthquake every year. Taiwan also has many earthquakes , __4__ usually they aren’t very __5__. The biggest earthquake in the world has a Magnitude (震级) of 9.5. It was in Chile（智利）, South America, in 1960.

 Most earthquakes are below a magnitude of 6.0. People can feel the earthquakes a little, but they seldom bring any damages (损失).__6__ an earthquake is above a magnitude of 8.0 , it is called a great earthquake. It will bring ___7___ of damage, and many people may be hurt or die（死亡）. __8__ December 2004, the fourth __9__ earthquake since (从。。。以来) 1990 in the world hit（击、打） Indonesia. It brought a big tsunami (海啸). The tsunami is a large wave of water. Hundreds of thousands of people died in the disaster. In May 2008, the earthquake in Sichuan brought much damage.

When an earthquake __10__, the first thing we should do is to drop to the ground . Then take cover under a strong desk or table . Finally, hold on to something until the shaking stops.

(　) 1. A. look                            B. grow                        C. know                      D. sure

(　) 2. A. have                    B. happen                    C. find                  D. go

(　) 3. A. We                             B. They                        C. You                   D I

(　) 4. A. or                        B. so                           C. and                  D but

(　) 5. A. small                   B. big                           C. long                  D. short

(　) 6. A. If                        B. What                        C. Which              D. Where

(　) 7. A. a little                  B. little                         C. lots                   D. many.

(　) 8. A. On                             B. At                            C. By                    D. In

(　) 9. A. biggest                 B. smallest                    C. most                 D. least

(　) 10. A. comes                B. goes                         C. takes                 D. feels