综合类：补全短文The first four minutes
When do people decide whether or not they want to become friends? During their first four minutes together， according to a book by Dr. Leonard Zunin. In his book， "Contact: The first four minutes，" he offers this advice to anyone interested in starting new friendships: __46__. A lot of peoples whole lives would change if they did just that.
You may have noticed that average person does not give his undivided attention to someone he has just met.__47__. If anyone has ever done this to you， you probably did not like him very much.
When we are introduced to new people， the author suggests， we should try to appear friendly and self-confident. In general， he says， "People like people who like themselves."
On the other hand， we should not make the other person think we are too sure of ourselves. It is important to appear interested and sympathetic， realizing that the other person has his won needs， fears， and hopes.
Hearing such advice， one might say， "But Im not a friendly， self-confident person. Thats not my nature. It would be dishonest for me to at that way."
__48__. We can become accustomed to any changes we choose to make in our personality. "It is like getting used to a new car. It may be unfamiliar at first， but it goes much better than the old one."
But isnt it dishonest to give the appearance of friendly self-confidence when we dont actually feel that way? Perhaps， but according to Dr. Zunin， "total honest" is not always good for social relationships， especially during the first few minutes of contact. There is a time for everything， and a certain amount of play-acting may be best for the first few minutes of contact with a stranger. That is not the time to complain about ones health or to mention faults one finds in other people. It is not the time to tell the whole truth about ones opinions and impressions.
__49__. For a husband and wife or a parent and child， problems often arise during their first four minutes together after they have been apart. Dr. Zunin suggests that these first few minutes together be treated with care. If there are unpleasant matters to be discussed， they should be dealt with later.
The author says that interpersonal relations should be taught as a required course in every school， along with reading， writing， and mathematics. __50__ that is at least as important as how much we know.
A. In reply， Dr. Zunin would claim that a little practice can help us feel comfortable about changing our social habits.
B. Much of what has been said about strangers also applies to relationships with family members and friends.
C. In his opinion， success in life depends mainly on how we get along with other people.
D. Every time you meet someone in a social situation， give him your undivided attention for four minutes.
E. He keeps looking over the other persons shoulder， as if hoping to find someone more interesting in another part of the room.
F. He is eager to make friends with everyone.
正确答案：41——45 DDCAC
答案解析：41. "a cloud that contained Gobi desert dust as well as hydrocarbons from industrial pollution."
42. "found that the amount of light reflected by the particles in the air was more than 550 percent greater than normal for that time of year."
43. "Taking samples at various levels from 15，000 feet to 20，000 feet in altitude"表达的意思与题干不同。
44. 需要看懂全段，直接找到答案。此处使用排除法太浪费时间了。
45. 根据however这个词的转折关系不难得到答案。