5. The author's major conclusion about the function of mistakes in foreign language learning is that _____.
　A. mistakes are not important in the process of learning a language
　B. learners are often very afraid of making mistakes
　C. making mistakes can help the learner discover the rules of the language
　D. native speakers often do not tell foreign language learners about their mistakes
答案：C逻辑推理题。文章的最后一句话的意思是“一个不愿意用语言交流的学生会失去在错误中学习的机会。前面又列举了像西班牙人在和native speaker的交流中才发现一般现在时的使用不当。因此犯错误能帮助学习者发现语言的规律。

Passage 2 

The Chinese have used a method called acupuncture（针灸）to perform operations for about 4,000 years without putting the patient to sleep. This involves placing flexible needles into certain parts of the body. The needles are available in a number of stores in China and anyone may buy them.

To learn how to use the needles takes about one month of training. But to be skillful requires greater time. The person who performs the acupuncture knows how to put in the needles so the needles themselves are not painful. This person also knows where to place the needles so the patient feels no pain in the area where the operation is to be performed. A particular operation might require 25 or more needles placed in various parts of the body. But now this operation requires only 3 or 4 needles.

Today, the Chinese doctors are trying to learn more about acupuncture. They are trying to develop a convincing theory to explain how the needles work in preventing pain, or why a needle in the wrist, for example, would prevent the pain in the area of the mouth.

A patient who needs an operation is given a choice between having acupuncture or having one of the chemicals used for putting him to sleep. It has been estimated that over half of the patients choose acupuncture because there is no sickness after the operation because the chemical may make the patient sick for a few hours or a day.

6. Acupuncture is _____.
　A. a medical operation　B. a medical needle　C. a medical technique　D. a medical machine
答案：A 细节题。答案在第一段的第一句话:“中国人用针灸进行手术已经有4000年的历史了”，因此可以断定针灸是个医学手术。

7. Which statement is not true of the performer of acupuncture?
　A. He knows where to place the needles without pain.
　B. He knows where the operation is to be performed.
　C. He knows how to perform the operation to cure the patient.
　D. He knows how to use the needles in an operation. 
答案：C细节题。答案在第二段的第三句话和第四句话。“The person who performs the acupuncture knows how to put in the needles so the needles themselves are not painful. This person also knows where to place the needles so the patient feels no pain in the area where the operation is to be performed.”针灸的医生知道如何扎针，针就不会疼；同时知道把针放在什么位置病人就不会感觉痛。因此A，B，D都符合文章的内容。但是并没有提到他知道如何进行手术来治好病人。只有C是错误的。