单选题By "Ellen Spero isn't biting her nails just yet" in Paragraph 1, the author means ______.

单选题Questions 17—20 are based on the following text about a firefighter. You now have 20 seconds to read Questions 17—20.

单选题According to the passage, where can the tallest brick lighthouse in the United States be found?

单选题Which of the following phrases in the fifth paragraph indicates the fridge's negative effect onthe environment?

单选题Why has the government shifted its policies from a macroeconomic approach promoting construction to housing subsidies?

单选题Which of the following statements is supported by the passage?

单选题Physicists' recent investigations of the decay of the vacuum, as described in the passage, most closely resemble which of the following hypothetical events in other disciplines?

单选题Americanschoosetheirpresidentonthe______.A.2ndofDecemberB.2ndofNovemberC.2ndofSeptemberD.2ndofOctober

单选题Tea drinking was common in China for nearly one thousand years before anyone in Europe had ever heard about tea. People in Britain were much slower in finding out what tea was like, mainly because tea was very expensive. It could not be bought in shops and even those people who could afford to have it sent from Holland did so only because it was a fashionable curiosity. Some of them were not sure how to use it. They thought it was a vegetable and tried cooking the leaves. Then they served them mixed with butter and salt. They soon discovered their mistake but many people used to spread the used tea leaves on bread and give them to their children as sandwiches. Tea remained scarce and very expensive in England until the ships of the East India Company began to bring it direct from China early in the seventeenth century. During the next few years so much tea came into the country that the price fell and many people could afford to buy it. At the same time people on the Continent were becoming more and more fond of tea. Until then tea had been drunk without milk in it, but one day a famous French lady named Madame de Sevigne decided to see what tea tasted like when milk was added. She found it so pleasant that she would never again drink it without milk. Because she was such a great lady her friends thought they must copy everything she did, so they also drank their tea with milk in it. Slowly this habit spread until it reached England and today only very few Britons drink tea without milk. At first, tea was usually drunk after dinner in the evening. No one ever thought of drinking tea in the afternoon until a duchess found that a cup of tea and a piece of cake at three or four o'clock stopped her getting a sinking feeling as she called it. She invited her friends to have this new meal with her and so, tea-time was born.

单选题[此试题无题干]

单选题Which of the following can best characterize the US?

单选题Questions 14-16 are based on the following monologue.

单选题The old man, ______ abroad for twenty years, is on the way back to his motherland. A. to Work B. working C. to have worked D. having worked

单选题{{I}} You will hear four dialogues or monologues. Before listening to each one, you will have 5 seconds to read each of the questions which accompany it. While listening, answer each question by choosing A, B, C or D. After listening, you will have 10 seconds to check your answer to each question. You will hear each piece ONLY ONCE.{{/I}} Questions 11-13 are based on a conversation between a man anda woman．

单选题How did Braille make use of raised dots in his code?