题目内容
（请给出正确答案）
________ no cause for alarm, the old man went back to his bedroom.
A．There was
B．Since
C．Being
D．There being
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7 Poor schooling was the root of the unemployment problem,
A base B result C cause D force
The writer concludes that school rules to forbid smoking ______.
A．should be introduced, for it really works at the school where he once studied
B．should not be introduced, for it may cause disturbance
C．should be introduced though it may not work effectively
D．needn't be introduced as long as teachers don't smoke in front of children
Which of the following statements does the author tend to agree with？
A．The use of drugs for non-medicinal purposes is an acceptable part of a person's lifestyle.
B．The spreading of pop music may cause the drug abuse to go beyond country,boundaries.
C．No efforts have been made to prevent the spreading of drug abuse.
D．The governments have no ability to act against the pro-drug messages of the youth culture.
下面的短文有15处空白，请根据短文内容为每处空白确定一个最佳选项。
Sharks Perform. a Service for Earth's Waters
It is hard to get people to think of sharks as anything but a deadly enemy. They are thought to (51) people frequently. Although these fish perform. a valuable (52) for earth's waters and for human beings, business and sport fishing are threatening their (53) . As a result, some sharks are at risk of disappearing from Earth.
Warm weather may influence both fish and shark (54) . Many fish swim near coastal areas because of their (55) waters. Experts say sharks may follow the fish into the same areas, (56) people also swim. In fact, most sharks do not purposely charge at or bite humans. They are thought to mistake a person (57) a sea animal, such as a seal (海豹) or sea lion. That is why people should not swim in the ocean when the sun goes down or comes up, because those are the times when sharks are looking for (58) . Experts also say that bright colors and shiny jewelry (珠宝) may cause sharks to attack.
A shark has an extremely 'good sense of (59) , with which it can find small amounts of substances in water, such as blood, body liquids and chemicals (60) by animals. These powerful senses help sharks find their food. Sharks eat fish, any (61) sharks, and plants that live in the ocean.
Medical researchers want to learn more about the shark's body defense and immune (免疫的) (62) against disease. Researchers know that sharks (63) quickly from injuries. They study the shark in hopes of finding a way to fight human disease.
Sharks are important for the world's oceans, as they eat injured and diseased fish. Their (64) activities mean that the numbers of other fish in ocean waters do not become too (65) . This protects the plants and other forms of life that exist in the oceans.
51 A meet B attack C recognize D visit
A.fo=open(’’123.csv’’，’’r’’)
B.fo=open(’’123.csv’’，’’w’’)
C.fo=open(’’123.csv’’，’’x’’)
D.fo=open(’’123.csv’’，’’a’’)
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