单选题Jack: John, you look terrible! ______? John: My girlfriend broke up with me.

单选题Talking to foreigners is fun if you ______ the right time and place.

单选题{{B}}Directions: {{/B}}There are 20 blanks in the following passage, and for each blank there are 4 choices marked A, B, C and D at the end of the passage. You should choose ONE answer that best fits into the passage. Then blacken the corresponding letter on the Answer Sheet. Thirty years ago, most teenagers had bicycles, but now they are comparatively rare.{{U}} (56) {{/U}}, motor scooters(小型摩托车)are much more common.{{U}} (57) {{/U}}, this may seem to be a sign of progress but{{U}} (58) {{/U}}the change is not necessarily for the better.It is easy to see why young people prefer scooters.{{U}} (59) {{/U}}, they are much faster and do not require much physical effort;{{U}} (60) {{/U}}, you can take a passenger with you on the pil-lion(后座)seat behind;{{U}} (61) {{/U}}, they give young people a feeling of independence, be-cause they can travel further and impress their friends.{{U}} (62) {{/U}}, the disadvantages are equally obvious.{{U}} (63) {{/U}}first sight, scooters are more expensive to buy and to maintain, and{{U}} (64) {{/U}}those under 16 are not allowed to have them.{{U}} (65) {{/U}}, greater freedom brings danger because speed encourages young people to take risks and as a result scooters are in-volved{{U}} (66) {{/U}}more accidents, and the accidents are{{U}} (67) {{/U}}more serious.Bicycles are safer and easier to control. Years ago, teenagers had more experience with them because they{{U}} (68) {{/U}}to ride as young children, and consequently knew what they were capable of.{{U}} (69) {{/U}}, many young people overestimate what a scooter can do and pre-tend it has the power of a motorcycle.{{U}} (70) {{/U}}, the fact is that bicycles are not very safe{{U}} (71) {{/U}}in cities these days because there are more cars and drivers are not used to them and do not make allowances for them.{{U}}(72) {{/U}}, those who are old enough to ride scooters naturally prefer them. Those who are too young or cannot afford to buy a scooter probably find bicycles glow and uncomforta-ble {{U}}(73) {{/U}}, and riding bicycles requires{{U}} (74) {{/U}}experience of traffic than before. On bal-ance, the change has been for the worse,{{U}} (75) {{/U}}for the 13-and 14-year-olds, but the only safe solution would be to have special lanes(车道)for cyclists.

单选题Only when he finished his homework ______ that he had made a mistake.

单选题I once worked in the place______I visited last week.

单选题Salt is as necessary to life as water. In many areas of Africa people once drank the urine (尿) of animals because they had no other source of salt. Without salt, human beings die. The human body demands that the amount of salt in the blood always stay the same. When the body does not get enough salt, it protects itself by letting less salt leave the body in urine and sweat. But it cannot reduce this output to zero. Some salt is always escaping. On a completely saltless diet, like that of some people in Africa, the body steadily loses small amounts of salt through the kidneys (肾) and sweat glands (腺). It then tries to adjust to this loss by speeding up its secretion (分泌) of water. (78) In this way， the body attempts to keep the amount of salt in the blood at the necessary level. The result is a slow drying up of body and, finally, death. The person dies of thirst. In cases where there is little or no water to drink, the body tries to do the opposite thing. Again, it must keep the salt level in the blood constant. Because it has little water, it attempts to stop water from leaving the body and to increase its secretion of salt. But, as with the escaping salt, it cannot be completely successful. Some water still leaves and the person eventually dies of thirst. In short, the body's normal needs for salt and for water are both parts of the same important need to keep the salt level in the blood constant.

单选题He ______ working till he was seventy years old.

单选题Because this picture is not genuine, it is completely _____.

单选题______ student with a little common sense should be able to answer the question.

单选题Human beings are superior to animals _____ they can use language as a tool to communicate.

单选题Like most people, I was brought up to look upon life as a process of getting. (76) It was not until in my late thirties that I made this important discovery: giving-away makes life so much more exciting. You need not worry if you lack money. This is how I experimented with giving-away. If an idea for improving the window display of a neighborhood store flashes to me, I step in and make the suggestion to the storekeeper. One discovery I made about giving-away is that it is almost impossible to give away anything in this world without getting something back, though the return often comes in an unexpected form. One Sunday morning the local post office delivered an important special delivery letter to my home, though it was addressed to me at my office. I wrote the postmaster a note of appreciation. More than a year later I needed a post office box for a new business I was starting. I was told at the window that there were no boxes left, and that my name would have to go on a long waiting list. As I was about to leave, the postmaster appeared in the doorway. He had overheard (无意中听到) our conversation. "Wasn't it you that wrote us that letter a year ago about delivering a special delivery to your home?" I said yes. "Well, you certainly are going to have a box in this post office if we have to make one for you. You don't know what a letter like that means to us. We usually get nothing but complaints.\

单选题It is recommended that the project ______ until all the preparations have been made.

单选题Susan: Let"s go to the restaurant and have dinner right now! Marilyn: OK. Let"s get in. Susan: Thanks. ______.

单选题When we see well, we do not think about our eyes very often. It is only when we cannot See perfectly that we realize how important our eyes are. People who are near-sighted can only see things that are very close to their eyes. Everything else seems blurry (unclear). Many people who do a lot of work, such as writing, reading and sewing, become near-sighted. People who are far-sighted suffer from just the opposite problem. They can see things that are far away, but they have difficulty in reading a book unless they hold it at arm"s length, lf they want to do much reading, they must get glasses, too. Other people do not see clearly because their eyes are not exactly the right shape. They have what is called astigmatism (散光). This, too, can be corrected by glasses. Some people"s eyes become cloudy because of cataracts(白内障). Long ago these people often became blind. Now, however, it is possible to operate on the cataracts and remove them. Having two good eyes is important for judging distances. Each eye sees things from a slightly different angle (角度). To prove this to yourself, look at an object out of one eye; then look at the same object out of your other eye. You will find the object"s relation to the background and other things around it has changed. The difference between these two different eye views helps us to judge how far away an object is. People who have only one eye cannot judge distance as people with two eyes can.

单选题My brother has ______ a return ticket for me to go to New York.A. takenB. orderedC. broughtD. booked

单选题He's perfectly (content) (living) in a hut and (paint) pictures (all day).

单选题The nation as a whole cannot become rich ______ the peasants are relatively well off.

单选题He thought the painting was of little ______, so he let me have it for only ten dollars.A. price B. cost C. value D. expenses

单选题The company is starting a new advertising campaign to ______ new customers to its stores.

单选题Your gestures need to accompany and ______ what you are saying.