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发布时间：2006-06-29 17:33     点击：

might come right out of his mouth. It was easier to eat

without them. And one could always use a device called

a masticator. This crude, jagged pincer chewed the

food right on the plate. The masticator worked with a

side-to-side action. The instrument, said the

directions, is best worked when held horizontally with

both hands. To avoid chilling the food. Dip the blades

into hot water from time to time.

46. This passage is primarily about__________.

　　A) trouble caused by false teeth B) false teeth in

the 1700s

　　C) teeth carved from ivory D) the history of

dentistry

47. The writer told about Jim to show that__________ .

　　A) teeth can be lost in different ways

　　B) false teeth are made of ivory

　　C) modern denture are better that those of the past

　　D) poor people in the past received no dental care

48. Early false teeth were worn to________.

　　A) make their wearers look better B) keep the gums

from shrinking

　　C) help their wearers chew tough food D) show their

wearers are well-off

49. Carved dentures were hard to eat with because

they________.

　　A) were too sticky B) came out easily C) worked

with horizontally D) were too sharp

50. The word instrument in the last paracaaraph

refers to_________.

　　A) sticky food B) false teeth wearer C) side-to-

side action D) masticator

Passage Ⅲ Questions 51-55 are based on the following

passage.

　　It is possible to stop most drug addiction in the

United States within a short time. Simply make all

drugs available and sell them at cost. Label each drug

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