单选题It is not easy ______ the answer to the difficult math problem.

单选题Speaker A: I want to take part in the school Talent Show. Speaker B: That"s nice! ______ Speaker A: Well, I like to sing.

单选题Which of the following is true of the heating system of the Johnstown campus?

单选题—I hate dressing up. In my opinion, if you dress up, you're only one thing. —______. —A fool.

单选题As the National Park Service celebrates its 100th anniversary (周年纪念), President Barack Obama has announced the establishment of one new national monument, and the expansion (扩大) of another. In Maine, more than 87,500 acres of forest will become government-protected parkland for the first time. In Hawaii, a national monument created by President George W. Bush in 2006 will expand to about 582,578 square miles, four times its current size. Obama has now created or enlarged 26 national monuments during his presidency. As a result, his administration says, Obama has protected more of the nation"s land than any other president has. But some residents and officials, in both Maine and Hawaii, object to the plans. （78） They say their local economies depend on the use of these areas. In establishing this monument, Obama took the side of conservationists (自然次源保护者) who want laws to protect wild lands. Creating a national park usually requires the approval of Congress. But a 1906 federal law allows the president to establish national monuments on his own. The land"s new status as a monument means that mining and drilling operations are forbidden there. （79） It may also severely limit activities such as logging, road-building, and hunting. Some of Maine"s politicians who want to protect the state"s logging industries say Obama should not have acted alone. They say Washington should not tell the States how to use their land, especially when people"s jobs are at stake . Maine politician Susan Collins said the president should have listened to Maine lawmakers and residents, as well as to the U. S. Congress before making his decision. However, those who support the president"s decision say the establishment of the new monument will lead to new jobs through tourism.

单选题He behaves in a strange manner, and nobody can ______ this.

单选题The streets were empty______the policemen on duty.A. besidesB. exceptC. exceptingD. except for

单选题W: Have you had the brakes (刹车) and tires (轮胎) checked? And do you have enough money? M: ______

单选题Doctor: ______ Patient: I've caught a bad cold and got a sour throat.

单选题A great celebration is going to be held (　　)the distinguished writer.

单选题Why don't birds get lost on their long flights from one place to another? Scientists have puzzled over this question for many years. Now they're beginning to fill in the blanks. Not long ago, experiments showed that birds rely on the sun to guide them during daylight hours. But what about birds that fly by night? Tests with artificial stars have proved that certain night - flying birds are able to follow the stars in their long- distance flights. A dove (鸽子)had spent its lifetime in a cage and had never flown under a natural sky. Yet it showed an inborn ability to use the stars for guidance. The bird's cage was placed under an artificial star-filled sky. The bird tried to fly in the same direction as that taken by his outdoor cousins. Any change in the position of the artificial stars caused a change in the direction of his flight. But the stars are apparently their principal means of navigation(航行)only. When the stars are hidden by clouds, they seemingly find their way by such landmarks as mountain ranges, coast lines, and river courses. But when it's too dark to see these, the doves circle helplessly, unable to find their way.

单选题{{B}}Passage 10{{/B}} After a busy day of work and play, the body needs to rest. Sleep is necessary for good health. During this time, the body recovers from the activities of the previous day. The rest that you get while sleeping enables your body to prepare itself for the next day. There are four levels of sleep, each being a little deeper than the one before. As you sleep, your muscles relax little by little. Your heart beats more slowly, and your brain slows down. After you reach the fourth level, your body shifts back and forth from one level of sleep to the other. Although your mind slows down, from time to time you will dream. (10) {{U}}Scientists who study sleep state that when dreaming occurs, your eyeballs begin to move more quickly (although your eyelids are closed).{{/U}} This stage of sleep is called REM, which stands for rapid eye movement. If you have trouble failing asleep, some people recommend breathing very slowly and very deeply. Other people believed that drinking warm milk will help make you {{U}}drowsy{{/U}}. There is also an old suggestion that counting sheep put you to sleep!

单选题I have two friends, but ______ of them likes to go fishing with me.

单选题We were tired and nervous ______the constant tension.

单选题There were a lot of people standing at the door and the small girl couldn't get ______.A. betweenB. throughC. acrossD. beyond

单选题The population of China __________ larger than that of any other country in the world.

单选题Enid: Grand Buy Department Store is having its anniversary sale, so I’d take my son to go shopping tomorrow. How long will it take to go there by bus? Greta: ______________ But why don’t you use the subway? That’d be much faster.

单选题The businessman’s __________ purpose was to sell the product.

单选题(Even though) Sandra (has been studying) English for three years (before) she came to the United States, it is difficult for her (to express herself).