单选题An action that is lavishly rewarded as soon as it is performed is well on its way to becoming a habit.

单选题A: Let ' s meet again some time early next week and see what each of us comes up with. B:______ A. Can I make an appointment with you on Monday afternoon? B. Monday afternoon is fine with me. C. Let' s go to dinner together on Monday. D. I look forward to seeing you on Monday.

单选题Consider the universal cannibalism of the sea, all of whose creatures ______ one another.

单选题The money most American firms put in work force training mainly goes on ______.

单选题She was undecided about ______ his offer.

单选题______ at in his way, the situation does not seem so desperate. A. Looking B. Looked C. Being looked D. To look

单选题A thorough study of biology requires ______ with the properties of trees and plants, and the habit of birds and beasts. A. acquisition B. discrimination C. curiosity D. familiarity

单选题At first I guessed it was an airplane, but I soon changed my mind because it remained {{U}}static{{/U}} instead of moving like a plane.

单选题In applied investigation, ______.

单选题When Mr. Black retired, his son______the business.A. took upB. took overC. took onD. took out

单选题According to the passage it can be inferred that ______.

单选题The very biggest and most murderous wars during the industrial age were intra industrial-wars that______Second Wave nations like Germany and Britain against one another. A. pitted B. drove C. kept D. embarked

单选题Another thing an astronaut has to learn about is eating in space. Food is weightless, just as men are. Food for space has to be packed in special ways. Some of it goes into tubes that a man can squeeze into his mouth. Bite-sized cookies are packed in plastic. There is a good reason for covering each bite. The plastic keeps pieces of food from travelling in the spaceship. On the earth very small pieces of food would simply fall to the floor. But gravity doesn' t pull them to the floor when they are out of the plastic in a spaceship. (78) They move here and there and can get into a man' s eyes or into the spaceship' s instruments. If any of the instruments is blocked, the astronauts may have trouble getting safely home. As astronauts travel on longer space trips, he must take time to sleep. An astronaut can fit himself to his seat with a kind of seat belt. Or, if he wants to, he can sleep in a sleeping bag which is fixed in place under his seat. But be careful he must put his hands under the belt when he goes to sleep. This is because he is really afraid that he might touch one of controls that isn' t supposed to be touched until later.

单选题______ enough time to study, I would have been able to enter university.

单选题The newly released movie was______ as to arouse so much sensation among the young people.

单选题Where in our brain do we ______ meanings to words?

单选题Nobody in the company pays attention to his opinion, because what he has said is always mere______ A. commonplace B. common C. ordinary D. homely

单选题从下面提供的答案中选出应填入下列英文语句中______内的正确答案。 Software quality assurance is now an (1) sub-discipline of software engineering. As Buckly and Oston point out, (2) software quality assurance is likely to lead to an ultimate (3) of software costs. However, the major hurdle in the path of software management in this area is the lack of (4) software standards. The development of accepted and generally applicable standards should be one ofthe principal goals of (5) in software engineering.

单选题He has ______ 1,000 in less than a week.