军队院校生长军（警）官招生考试
单选题—The air pollution is terrible.—It will be worse ______we take action to protect the environment.A ifB unlessC untilD when
题目
if
unless
until
when
参考答案和解析
句意：—空气污染很严重。—这将会更严重，除非我们采取行动来保护环境。本题考查连词的用法。根据上下文句意可知此处应填入B项unless“除非”。if如果。until直到。when当……时候。
相似问题和答案
第1题：
In the writer's view, the more new goods there are,______.
A. the less pollution we have
B. the harder pollution can be done away with
C. the more pollution there will be
D. the more easily pollution can be controlled
此题为主旨题。作者的观点是生产的新产品越多污染将越多。
第2题：
Some people fear that ________ air pollution may bring about changes in _______ weather around the world.
A. /; the
B. the; /
C. an; the
D. the; a
第3题：
A. rate
B. proportion
C. extent
D. amount
第4题：
Air pollution
People and air pollution are often in the same places. This means that cities with large populations have the biggest problem of dirty air. Air pollution is caused by many different things. A major kind of air pollution is the gas from cars. Statistics(统计资料) show that 93 percent of all auto trips are within cities.
Another major kind of dirty air is the burning of coal and oil for energy. This energy is needed to make electricity. Of course, much more electricity is used in the city than in the county.
On the average, we throw away more rubbish than the year before. The burning of rubbish makes air pollution even worse. Many major industries are also responsible for the dirty air in the around cities. The fumes(烟)from iron, steel, chemical, and petrol production add particles(微粒)to the air.
The effects of air pollution range from mild headaches to death. The levels of pollution found in heavy traffic may cause headaches for loss of clear vision. Wherever coal and oil are used for fuel, fumes may kill trees and plants and cause metal to corrode(腐蚀). In some of the larger cities, these fumes endanger the lives of human beings by contributing to lung diseases and causing early death.
26. The key point of the passage is that().
A. the cause of air pollution is people
B. the causes and the effects of air pollution are both found in cities
C. the effects of air pollution range from headaches to death
27. What is the purpose of this passage?
A. to persuade people to stop polluting the air().
B. to tell the causes of air pollution
C. to tell why cities are bad places to live
28. Why is air pollution more grave in the city than in the country?().
A. Because there are larger populations in cities.
B. Because the air in the city is dirty.
C. Because there are much more gas fumes from cars and burning of coal and oil for energy in the city than in the country.
29. The fumes from coal and oil may cause metal().
A. to corrode
B. to twist
C. to turn black
30. In larger cities, the fumes from coal and oil may contribute to().
A. heart disease
B. loss of clear vision
C. lung diseases
参考答案：26、A 27、B 28、A 29、A 30、C
第5题：
We should prevent pollution () happily.
A. living
B. for living
C. to live
D. to living
第6题：
It' high time that we______(do)something to stop pollution.
did[解析] 虚拟语气，It's(high)time that we did…。
第7题：
The air pollution exceeds most ________ levels by 10 times or more.
A acceptable
B accessible
C available
D applicable
第8题：
A、in
B、to
C、with
第9题：
In Leon Nacson’s view, air and water are our Number One priorities for the following reasons except ().
A、he cannot understand why people are polluting air and water
B、there will definitely be no fresh air and clean water for future generations
C、we would run out of air and water if we didn’t stop polluting them
D、air and water polluting are the current and futu
第10题：
A.What a pleasure!
B.That‘s true.
C.Never mind.
D.That‘s terrible.