Dust storms are Beijing again. The people of Beijing are wearing masks to protect their mouths and noses. The dust storms are a problem for the people of Beijing. For several years. The storms have made being outdoors dangerous. Why do the sandstorms hit Beijing and How do we solve the problem?

The sand and dust are a problem whenever the wind comes from the north.. ①When the wind is________, it        dust and sand from the desert to north-west China.②Often the sandstorms are so bad that drivers have to be careful and use their headlamps to help them see what’s in front of them.

The Central Meteorological Station(中央气象台)says that sandstorms are a problem in summer because the land is drier. This means that the earth does not stick to the ground and the wind carries more sand and dust. When there is more rain, this does not happen, but this area is one of the driest places in the country. Dust storms also affect(影响)other areas like central and northern parts of China. Gansu and Shanxi provinces are also affected.

   Sandstorms are a difficult problem because of people’s carelessness with the trees and grasslands. People are cutting down too many trees and raising too many sheep or cows on grasslands．So many grasslands and farmland become desert(沙漠)or sand. One way to solve the problem is to plant trees to hold earth to the ground. This will also bring more rain because plants help make the world’s rain. So, solving the problem needs a long-term plan. Today, the people of northern China have to protect themselves from the effects of this unpleasant natural disaster．

76. 在①处填上适当词使文章完整。___________　___________

77. 将②处译成汉语。

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78. What’s the reason to make many farmlands and grasslands become desert?

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79. 找出与下列句子意思相同的句子。

Other areas like central and northern parts of China are also affected by the sandstorms.

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80. 找出本文的主题句。

Have you ever heard anyone say“It’s raining cats and dogs”? It means“It’s raining hard!”
　　But sometimes cats and dogs do drop from the sky! Here’s how it happens.
　　Not so long ago, a country far away had many large rats. The people there said,“We need cats!”So cats were sent to them by airplane. But the country had many mountains. It was hard for an airplane to land. So the cats came down by parachute(降落伞). Did the cats like the ride? They didn’t say they didn’t! And today they are still catching rats!
　　In another country far away, there is snow the year around. People sometimes got lost in it.
　　“We need big dogs!”the people said.“The dogs could find people lost in the snow. The dogs could help bring them home. Where can we get big dogs?”
　　A man across the sea had big dogs to sell.“I will send dogs to you.”He said.“I have some very big ones. They can find people lost in the snow.”
　　He sent the dogs by airplane.
　　But the airplane didn’t land in the snow. The dogs came down by parachute—you guessed it!
　　Did the dogs like the ride? They didn’t say they didn’t! And today they are well and happy. They find anyone who gets lost in the snow. Then they help him get home. Good dogs!
　　Remember it, so you can say,“Yes, it does rain cats and dogs sometimes. They came down by parachute!”
　　1．The underlined word“it”in Paragraph 2 refers to_________.
　　A. the weather
　　B. the saying“It’s raining cats and dogs.”
　　C. the saying“It’s raining hard.”
　　D. the fact that real cats and dogs drop from the sky
　　2．Cats and dogs drop from the sky because_________.
　　A. there are many mountains in the country
　　B. it snows the year around in the country
　　C. it was hard for a plane to land in the two countries
　　D. coming down by parachute could save money
　　3．The underlined sentence“They didn’t say they didn’t!”in Paragraph 3 means“_________”.
　　A. Poor animals       B. Good animals
　　C. Have a nice trip       D. Thank you
　　4．Which of the following is not true according to the passage?
　　A. Cats and dogs can help people quite a lot.
　　B.“It rains cats and dogs.”usually means a heavy rain.
　　C. When the people saw cats drop from the plane, they were pleased.
　　D. The man across the sea didn’t want his dogs dropped by air.
　　5．The main purpose of the passage is to_________.
　　A. tell the readers a famous British saying
　　B. tell the readers of a new meaning about an old saying
　　C. show cats and dogs are our good friends
　　D. show parachutes is an important invention

Let’s go camping

　　What do we do when we go camp? First, we work out a plan. We take food, clothing, a knife, and things for cooking and eating. We take things to keep us away from insects and the sun.

　　Then we put everything into the car and we drive to the woods. We look for a place for campers (露营者) and we look for a good place for our tent(帐篷). The place should have a lot of moving air. This will keep some insects (虫子) away. High land with water on both sides of it is good. Then we put up our tent. We put everything into the tent, and we are ready for fun. We can swim in the lake, walk in the woods, climb a mountain, row a boat, or go fishing.

　　In the evening we come back to the tent, we build a big fire because it can keep the insects away. We sit around the fire and talk. We may tell interesting stories or we may sing songs.

　　At night we lie down on the grass. We can look up at the stars. It is a busy day, so we try to go to sleep early.

　　Everything is dark. Everything is quiet. We hope we won’t hear music from the radio in the next tent. We hope it won’t rain.

　　Multiple choice:

(   )16Before going to camp we should first _________.

　　A. draw up a plan　　　　　　　B. take some food

　　C. take things to keep us warm　　D. take something for cooking and eating

(   )17.We go to camp __________.

　　A. by bus　　　　 B. by car　　　　C. by bike　 　D. on foot

(   )18.Campers can take part in ________ activities.

　　A. one or two　 　B. only a few　　C. many　　　　D. two or three

(   )19.In the evening we build a fire because ________.

　　A. it is cold at night　　　　　　B. it can keep us warm

　　C. it can keep the insects away　 D. it is dark and quiet

(   )20.The campers like to ____ at night.

　　A. hear music from the radio　　　B. go to sleep early

　　C .have rain                 　D. be busy