用所给词的适当形式填空
1.She has a ________ (nature) ability to understand the motive(动机) of others.
2.Everybody should do something for birds ________ (active)
3.The ________ (travel) are planning to go to visit the Great Wall tomorrow.
4.The little pet’s________ (die) makes me very sad.
5.I think the food my mother cooks is ________ (tasty) of all.
根据括号中的中文提示或句意，写出句中所缺单词。
1.Ice turns into water when the ________ (温度) is above 0.
2.The wind blew in and the paper fell down u________ the ground.
3.Many wolves are dying out because of the l________ of living areas.
4.We will help them understand the ________ (重要性) of the question.
Everyone tries to get to school on time. But when bad weather gives you trouble（麻烦）, can you still make it before the bell rings?
In northern China during spring, big sandstorms（沙尘暴）often make trouble for students and everyone else. When the sky is dark with sand, buses and cars all move much more slowly. Sometimes, people can’t even see for 20 metres.
Sandstorms usually happen in spring. This year, sandstorms started in late March. They have happened in more than 10 provinces (省) in northern China this year. More than 70 million people have had problems in those places because of the sandstorms.
People in southern China don’t have to worry about this kind of bad weather. Most of the sand comes from Gansu and Inner Mongolia（内蒙古）. In northern China, lots of places have few trees and don’t get much rain. People there have been cutting down too many trees. When there aren’t many trees, the ground can’t keep enough water. Over the years, the ground dries up and turns to sand. When spring comes and the ice melts（融化）, the ground becomes looser（更松散的）. Strong winds take the loose sand into the sky.
Sandstorms are bad for people’s health. If people breathe（呼吸） too much sand, they could cough or have asthma（哮喘）.
Sandstorms also give farmers lots of problems. Sometimes their sheep get lost in the storms and never get back home. The winds also tear down farmers’ houses.
What can you do to stop sandstorms? Here’s an idea: Ask your parents to help you plant some trees this spring.
If you see people cutting down too many trees, tell them about the dangers of sandstorms, and ask your government to stop them from cutting.
1. In which season do sandstorms usually happen?
A. In spring. B. In summer.
C. In autumn. D. In winter.
2.Which of the following provinces in China is often hit by sandstorms?
A. Fujian Province. B. Yunnan Province.
C. Jiangsu Province D. Gansu Province.
3. The underlined phrase “tear down” in the sentence means “_________”.
A. 使……哭泣 B. 弄倒 C. 摧残 D.加固
4. According to the passage, what cannot be caused by sandstorms?
A. Health problems.
B. Traffic problems.
C. The loss of farm animals.
D. Noise pollution.
5.Which is not stated in the passage？_______________ .
A. Trees can help keep enough rain water
B. More trees need to be planted
C. Some people are doing harm to the environment
D. Sandstorms are the main cause of asthma（哮喘）
In nature, you may see many insects (昆虫）and animals of different colors. Have you ever wondered why?
Locusts are super delicious food for birds, but it is not always an easy job for birds to catch them. It is neither because locusts are good jumpers or runners nor because they are smarter than their enemies. The reason is that the colors of locusts change with the colors of crops(庄稼). When crops are young, locusts look green. But when autumn comes, locusts change to the yellow and brown color as crops do.
Brown bears, tigers and other animals move quietly through forests. They can’t be seen easily by their enemies. This is because they have colors similar to the trees. For the same reason, polar bears that live on a land of snow and ice are white. Butterflies and bees living among the flowers are colorful like flowers. Soil insects are mostly dark-colored and they live under the soil(土壤）in a dark and wet environment. However, insects with colors different from plants can easily be found and eaten by others. So in order to survive, they have to hide themselves in the daytime and appear only at night.
Have you ever noticed some even stranger acts? The ink fish in the sea can send out some very black ink when it faces danger. As the ink spreads over, its enemies will find themselves suddenly in a dark world. At the same time the ink fish immediately swims away. That is how it keeps itself safe though it is not strong at all.
1.It is not easy for birds to catch locusts because____________. .
A.locusts are good runners
B. locusts can jump very high
C. locusts are smarter than birds
D. locusts can change their color
2. According to the passage, most soil insects_________
A.do not have bright colors
B. change their colors with the soil
C. do not live in a dark and wet environment
D. Eat colorful insects like butterflies and bees
3.What’s the meaning of the underlined word “survive” in the passage?
A. 繁殖 B. 产卵 C. 觅食 D. 生存
4.The ink fish_______so that its enemies will not see it?
A. changes its color
B. makes the water around it black
C. appears only at night
D. hides itself in the sea rocks
5.What is the main ides of this passage?
A. Some insects and animals have different skills.
B. Some insects and animals are clever than we think.
C. Some insects and animals use colors to protect themselves.
D. Some insects and animals can get used to the environment easily.
完形填空: (共10小题，每小题1分，满分10分)
The world of out-of-doors is full of secrets. And they are so interesting that quite a lot of people are busy studying them. All around us are birds, animals, trees and flowers. The facts about how they ____ and grow are as interesting as anything could be.
Do you know that one of the great Presidents of the USA spent hours and hours ____birds? A businessman who lives near New York city became so____ in insects that he began to collect them. He now has more than one thousand different kinds carefully____ in glass boxes.
Come then with me, and I will help you find some of nature’s secrets. Let us go____through the woods and fields. Here we shall find now a rabbit tells the other rabbits that there is danger. We shall ____a mother bear and her young ones as they look for____ and get ready for winter sleep. We shall watch bees dancing in the air to let other bees know____ they can find food. I will show you many other interesting things, but the thing that I can____ you is to keep your eyes and ears ____ when you go out of doors. Nature tells her secrets only to people who look and listen carefully.
1.A. bear B. live C. speak D. fly
2.A. studying B. eating C. learning D. finding
3.A. friendly B. carefully C. busy D. interested
4.A. locked B. kept C. put D. filled
5.A. near B. quickly C. quietly D. politely
6.A. hear B. follow C. catch D. help
7.A. food B. fruit C. vegetables D. water
8.A. how B. why C. where D. when
9.A. make B. pass C. give D. teach
10.A. closed B. open C. safe D. clean
About seventy percent of our earth _______ by water.
A. is covering B. is covered
C. are covered D. are covering
