单选题A friendship may be______, casual, situational or deep and lasting.

单选题It all started in 1950, when people began to build their houses on the ______ of their cities.

单选题The girl said that she ______ here a week before.

单选题Since our research so far has not produced any answers to this problem, we need adopt a different ______ to it. A. approach B. way C. means D. method

单选题We felt very sad when we heard the news that the manager was killed in his office yesterday.

单选题We are convinced that we are on the _______ of an important discovery. A. threshold B. household C. thread D. entrance

单选题It was only a ______ injury, not all that serious.

单选题Woman: You are burning the candle at both ends.Man: But I haven't saved enough for my retirement.Woman: What do you live for? Today or tomorrow?Question: What does the woman imply?

单选题Nowadays, it's considered acceptable for a couple to ______ the marriage if it can't bring them happiness. A. hold out B. hold up C. break off D. break up

单选题A: Good evening, Juliet, my love. How have you been? B: Fine, ______.

单选题The law Uprohibits/U occupancy by more than 250 persons in this area.

单选题Don't have him for a friend. He's______ a criminal.

单选题If you want to watch dancing, you can call______.

单选题It is better to die on one's feet than ______ .

单选题This large city does almost no manufacturing and very little wholesale trade. Yet without the important service (1) provides, business everywhere would quickly grind to a (2) . Chaos would reign in all other leading cities. As you have guessed, the "product" we are talking about is government, and the city is the (3) of the United States, Washington, D. C. One out of every two persons (4) in the city works for the federal government. Washington has many (5) . It leads the nation in level of education achieved by its residents. More than fifteen percent of its adults have had four years or more of college. (6) scientists can be found here than in any other city. Since larger incomes are earned by (7) people, Washington has the highest median income of any city. Information is the vital force of the city. The Library of Congress (8) the largest and most comprehensive warehouse of information in the world. It contains 74 million items on hundreds of miles of (9) . In addition to books, these (10) include manuscripts, maps, photographs and documents. Papers of the Presidents all the way back to Washington are found here. The library is (11) to the public. It is considered by (12) to be one of the finest in the world. These people study the documents found in libraries. Washington has many important governmental buildings and historic shrines. (13) include the Capitol building, the White House, the Supreme Court, the Lincoln Memorial, and the Washington Monument. The Bureau of Engraving and Printing is (14) located here. This agency is responsible (15) putting new paper money into circulation. Tens of millions of dollars in money is (16) here every day. Unlike most cities, which grow in jumbled masses, Washington was planned on paper (17) any of its buildings were erected. The planners incorporated broad open areas around the historic landmarks and buildings. As a result the city is (18) . The central part of the city (19) a huge green park with broad, tree-lined boulevards and splendid (20) of its great structures.

单选题According to the speaker, the problem with "insider volumes" is that they ______.

单选题Only a few people have ______ to the full facts of the incident.

单选题－Do you mind if I open the window?－____.

单选题She worked hard at her task before she felt sure that the results would ______ her long effort.

单选题We have many holidays from the end of March till the beginning of April. They are the best days for ______. A. blade B. coincidence C. balcony D. entertainment