Part Ⅱ Listening Comprehension (20 points, 10 minutes)Directions: In this section, you will hear 2 long conversations. At the end of each conversation, one or more questions will be asked about what was said. The conversation will be spoken twice. After each question, there will be a pause. During the pause, you must read the four choices marked A), B), C) and D), and decide which is the best answer.Conversation 11. The man’s friend invited him for a meal because ______.
A) it was the friend’s birthday
B) it was the last day of term
C) the man and his friend were going to a restaurant
D) he wanted to take him to a pub
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30. What is the best possible title of the passage?
A) Drug and Food
B) Food and Health
C) Cancer and Health
D) Health and Drug
29. The word “carcinogenic” most nearly means_______.
A) trouble-making
B) color-retaining
C) money-making
D) cancer-causing
28. What are nitrates used for?
A) They preserve flavor in packaged foods.
B) They preserve the color of meats.
C) They are the objects of research.
D) They cause the animals to become fatter.
27. How has science done something harmful to mankind?
A) Because of science, diseases caused by polluted food haven been virtually eliminated.
B) It has caused a lack of information concerning the value of food.
C) Because of the application of science, some potentially harmful substances have been added to food.
D) The scientists have preserved the color of meats, but not of vegetables.
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