专升本英语-500

Nowadays most people decide quite (61) what kind of work they would do. When I was at school, we had to choose (62) when we were fifteen. I chose scientific subjects. " (63) , scientists will earn a lot of money," my parents said. (64) I tried to learn physics and chemistry, but in the (65) I decided that I (66) a scientist. It was a long time (67) I told my parents that I wasn’t happy at school. "I didn’t think you were," said my mother. " (68) ," said my father. "Well, the best thing to do now is to look for a job."
I (69) about it with my friends Frank and Lesley. (70) of them (71) suggest anything, but they promised that they would ask their friends. A few days later (72) I was still in bed, (73) telephoned. "Is that Miss Jenkins" a man’s voice asked. "I (74) your hobby is photography and I’ve
A. could
B. should
C. might
D. must

You’re alone, driving on a deserted stretch of highway. Suddenly you are enclosed by clouds of smoke and steam as the engine-temperature light flashes its red warning. You pull over to the slow lane and switch on the four-way emergency flashers. Then what Should you keep on rolling or get off the road as fast as you can safely do soKnowing what is happening and what to do in a car emergency can save time, money, worry--even your life.So learning how to check your car will help you handle some common car emergencies.
The engine’s bearings must constantly be lubricated (使润滑) by oil that circulates under pressure. When the oil pressure drops too low, the engine begins to self-destruct. The red oil-pressure warning light flashes on. Listen for any knocking, and sign of serious trouble. If the warning light flashes only at highway speeds and goes out at low speeds or while the engine idles, chances are’ the engine is just slightly low on oil. If the li
A. The warning light flashes only when the car runs at fast speed.
B. The warning light flashes only when the car is slowing down.
C. The warning light flashes continuously.
D. The warning light flashes when the engine idles.

What does a scientist do when he or she "explains" something Scientific explanation comes in two forms: generalization and reduction. Most psychologists deal with generalization. They explain particular instances of behavior as examples of general laws. For instance most psychologists would explain a pathologically strong fear of dogs as an example of classical conditioning. Presumably, the person was frightened earlier in life by a dog. An unpleasant stimulus was paired with the sight of the animal (perhaps the person was knocked down by an exuberant dog) and the subsequent sight of dogs evokes the earlier response--fear.
Most physiologists deal with reduction. Phenomena are explained in terms of simpler phenomena. For example, the movement of a muscle is explained in terms of changes in the membrane of muscle cells, entry of particular chemicals, and interactions between protein molecules within these cells. A molecular biologist would "explain" thes
A. A child chokes on a fishbone and as an adolescent is reluctant to eat fish.
B. A person feels lonely and after a while buys a dog for companionship.
C. A child studies science in school and later grows up to become a teacher.
D. A person hears that a snowstorm is predicted and that evening is afraid to drive hom

What we don’t know or refuse to recognize is that modern man has been altering his total environment so swiftly and suddenly that the whole "great chain of life" on this planet is in danger.
All of us live on a tiny spaceship carrying with it its own limited resources for survival.What we have now is all we will ever have to keep us alive.
But man has been harming this system. He cannot help it. Everything we do alters our environment: the ways we grow food and build shelter and create what we call "culture" and "civilization".
World population is growing at such a rate that by the year 2050 nearly seven billion people will live on the earth.Industrialization has added its own burden to the population pressure. The more we produce and consume, the more waste products we discharge into the air and water and land around us, where they do not disappear, but last forever in one form or another. Great progress i
A. great progress
B. agriculture
C. our soil
D. productivity