People and animals have worked together for thousands of years. Some dogs protect sheep from wolves, while others help cows find their way back home. Elephants are strong enough to help people do hard work. Cats hunt mice, stopping them from eating people’s food. People also train some animals to help in other ways.
 | Specially-trained monkeys can help people who can’t use their arms or legs. The monkeys can change CDs, get food and even brush hair for their owners (主人). |
 | Pigs use their noses to find delicious truffles (松露) that grow as deep as three feet underground. Truffles are one of the most expensive mushrooms in the world. |
 | Pigeons can usually return to their homes from any places, so people have used them to carry messages for thousands of years. |
 | You may know that some dogs can help their owners to see. But did you know that hearing dogs can help their owners to hear, making them notice the doorbells and people calling them? Dogs can also help policemen in a manhunt (追捕). Some are trained to find missing people. |
1．How many kinds of helpful animals are mentioned in the passage?
| A．Four. | B．Five. | C．Six. | D．Seven. |
2．From the passage, we know that the trained monkeys can’t ________.
| A．get food | B．change CDs |
| C．brush hair | D．carry messages |
3．If you can’t see, you need ______ to help you when you go out.
| A．dogs | B．cats | C．pigeons | D．pigs |
4．The ________ can help people in more ways according to the passage.
| A．cats | B．pigs | C．dogs | D．pigeons |
5．Which is the best title of the passage?
| A．Life of Animals | B．Helpful Animals | C．Animals in Danger | D．Training of Animals |
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