基础英语练习册答案 Unit 7

Unit 7

fantastic gorge terrific frontier authentic

immigrant wagon uncultivated oppress self-reliant

evolution routine scale attribute subtle

I.dictation

What is communication? The dictionary defines it: “giv ing or exchanging information by speaking or writing.” Animals can’t read or write or speak a human language but they do communicate. Animals exchange information about food, about territory, about danger and safety. They express fear, hunger, anger, pleasure and recognition.

Animal messages are not always expressed in sounds. Animals mark their territory in different ways. The scratches on the trees or the smell that remains on the stones tell other animals that the territory is occupied. Some animals communicate by touching. Lions, tigers and other members of the cat family show friendliness by rubbing their heads or necks together. Colour is sometimes very important in animal communication. Some kinds of fish change color when they are angry or frightened. A peacock displays the beautifully colored feathers in his tail when be wants to attract a female.

The next time you are walking in a forest or a field, look and listen for animal signals.

Passage B

Training a dog to be a watchdog often produces unexpected results. Some dogs quickly learn the difference between unwanted people and friends. This is because their masters welcome friends and invite them into their houses. However, some dogs will always attack the postman who comes to deliver letters. One explanation for this behavior is that, although the postman comes to the house often, he never enters the house. Therefore, the dog thinks the postman is someone who is not wanted, but keeps coming back anyway.

Masters of dogs who attack postmen can easily show the dog that the postman is a friend and that the dog does not need to treat him as an unwanted person. A dog is quite ready to do what his master wishes. And a dog is always happy when he is praised for understanding correctly.

F F T T F T F F

II.Spelling

1.interfere

2.apparently

3.surgical

4.emergency

5.substance

6.biochemist

7.ultimately

8.physician

9.vitamin 10.remedy 11.identification 12.voyage 1.pioneer 2.incredible municate 4.crawl 5.intelligence 6.psychologist 7.routine 8.evolution 9.inadequate 10preliminary

11.fierce 12.unparalleled

Translation

A. 1.There is bound to be someone who will object to having a singing contest next month.

2.After the accident, John was depressed to find that this brand-new car was damaged beyond hope of repair.

3.Would you take an offer of ,say,$100,for your old TV set?

4.Tom did not tell anyone other Disk that he would like very much to be a stuntman.

5.This job is not very profitable in terms of c ash earnings, but I’m getting valuable experience from it .

6.A diet lacking in nutritional value will not keep a person healthy.