There are nearly 400 different types of sharks, but only about 30 types have even been reported as attacking human beings.
The chances of being attacked by a shark are very small compared to other dangers. Many more people drown（溺死）in the ocean every year than are bitten by sharks. The low number of attacks that happen every year proves that sharks do not feed on humans if they have the choice. There are three types of shark attacks. The main one is known as a ‘hit and run’. The shark attacks because it thinks you are a fish, but when it tastes a human it decides not to eat you. The second type is called a ‘bump and bite’. The shark bumps you to find out if you are fit to be eaten and then bites you if it thinks you are. The third type is called a ‘sneak’. When attacking in this way, the shark waits for you to swim by and attacks you suddenly. The latter（后者的）two types of attack are more likely to be deadly for humans.
However, your chances of being attacked by a shark can be reduced if you follow the advice below.
Do not swim in the dark. Sharks can still see you but you cannot see them.
Do not swim if you are cut or if you have a fresh wound. Sharks can smell blood over a long distance.
Do not wear bright clothing or jewellery because sharks are attracted to colours and shiny objects.
Try and stay in groups, as sharks usually avoid large numbers of people.
Don’t be frightened（受惊吓）by sharks as there is 30 times greater chance of being hit by lightning than being attacked by a shark.
【小题1】Are there only 30 types of sharks in the world?
【小题2】Are the chances of being attacked by a shark small or big compared to other dangers?
【小题3】What are the two deadly shark attacks called?
【小题4】Why should you try and stay in groups to avoid the shark attack?
【小题5】What does the writer mainly tell us in the passage?

He was driving home one evening when he saw an old lady standing by the road. He could tell she needed help. So he stopped his car in front of her car and got out.
He smiled at her, but she was worried. Was he going to hurt her? He looked poor and hungry.
He said: “I’m here to help you ma’am. Why don’t you wait in the car? By the way ,my name is Joe.”
She had a flat tire（轮胎瘪了）. Joe crawled under the car and soon he was able to change the tire. But he had to get dirty and his hands hurt. She said that she couldn’t thank him enough for his help. Joe just smiled as he closed her trunk（后备箱）.
She asked him how much she owed（欠）him. But Joe wasn’t thinking about the money. This was helping someone in need. He told her that if she really wanted to pay him back, the next time she saw someone who needed help, she should lend a hand.
He waited until she had driven off and felt good as he headed for home.
A few miles down the road the lady saw a small café. She went in to get a bite to eat. The waitress brought a clean towel for her to wipe her wet hair. The waitress was nearly eight months pregnant（怀孕的）.It was tiring for her to move about. But she did it all with a sweet smile on her face. The lady was moved by the wonderful service the waitress was giving. After the lady had finished her meal, and the waitress had gone to get her change（零钱）from a ￥100 bill, the lady slipped（溜）out the door. At her table, the waitress found something written on a napkin.
There were tears in her eyes when she read what the lady had written. It said: “You don’t owe me a thing. I know life is hard for you right now. Someone once helped me out, the way I’m helping you. If you really want to pay me back, don’t let the chain（链）of love end with you.”
【小题1】When the old lady first saw the man, she was        .

An old man has a cat. The cat now is very old. She can’t run quickly, and she can’t bite 41    .One day the old cat saw a mouse, she jumped and   42 it. But she couldn’t bite it. So the mouse got out of her    43   and ran away. The old man got very    44  and beat the cat. The cat said to him. “Don’t beat your servant. Don’t be unkind to the 45  When they are young, they can do good work.”
【小题1】A. too        B. also        C. either
【小题2】 A. catch      B. caught      C. catches
【小题3】 A. mouth      B. eyes       C. hands
【小题4】A. sad         B. satisfied    C. angry
【小题5】A. young      B. old         C. sick