B. Passive sleep helps us to rest our bodies while active sleep helps us to rest our minds.
C. In passive sleep, the heart slows down and the body processes become very slow, leaving the body at rest.
D. In active sleep, the brain temperature rises and the brain becomes very active and then dreaming occurs, helping us to rest our minds.
Answer:
17. Read the following paragraph and underline the topic sentence.
Deaf people—people who can’t hear—are still able to communicate quite well, with a special language. It’s called sign language.The speaker of sign language uses hand gestures in order to communicate. Basic sign language has been used for a long, long time.
But sign language wasn’t really developed until about 250 years ago. In the middle of the 1700’s, a Frenchman named Epee developed sign language. Epee was able to speak and hear, but he worked during most of his life as a teacher of deaf people in France. Epee developed a large number of vocabulary words for sign 1anguage. Epee’s system used mostly “picture-image”signs. We call them picture-image signs because the signs create a picture.
18. Read the following paragraph carefully and select the best topic sentence from the four
possible answers that follow the paragraph.
Topic Sentence:
If you are tired of making vague excuses for another dull summer at home, here is a thought to lift your spirits. You do not need anything so radical as winning a lottery to finance a trip to Europe. A student identity card that can be obtained for a few dollars from the Council on International Educational Exchange entitles you to discount tickets on certain charter flights to London and Paris, as well as reduced admission to many museums, cinemas, and musical events. Once in Europe, you can stay at approved youth hostels for about two dollars a night.
So don’t give up your hopes of becoming an international traveler.
A. It is easy for a student to travel in Europe during the summer.
B. The student needs to obtain an identity card to travel at a cheap rate.
C. The student could stay at approved youth hostels for about two dollar a night.
D. The students will become international travelers in summer.
Ⅳ．重新组合段落(5 points，1 point each)
3