单选题In order to prove air takes up space, we can ______.

单选题How many people will be at the party?

单选题 Tobacco You most likely know that tobacco is a plant. It has large leaves that have been smoked in many forms for at least 2 000 years. But do you know that: Before the twentieth century, not many people died from using tobacco because there wasn't much tobacco being used. Cigarettes had to be rolled by hand. A person who was really fast could roll about four cigarettes a minute, or around 2 000 a day. In 1884 the cigarette manufacturing machine was invented that could produce 120 000 cigarettes a day. Soon the number being sold rose to one billion a year. As a result of advertising and efficient machines, the tobacco business continued to grow. Today about 840 packs of cigarettes are sold every second in the US. That's more than one million every hour! Imagine that! Blink you eyes and 840 packs are s01d. Blink again -- another 840 packs! As the number of cigarette sales increased, so did the number of deaths caused by cigarettes. Today one out of every five people who die in the US dies because of smoking. Smoking tobacco is responsible for more deaths than cocaine, heroin, alcohol, fire, automobile accidents, homicides, suicides, and AIDS combined. That amounts to about 430 000 people who die needlessly every year, 1 200 people who die every day because of their addiction to cigarettes. It's like having several completely full jumbo jets crash every day, killing all aboard! Who in the USA Smokes Cigarette smoking is a widespread habit in the United States today. About forty-three percent of the adult men and thirty-one percent of the adult women smoke regularly. It is quite encouraging to note,however,that millions of people have given up the smoking habit. Seventy-five percent of the male population and forty-six percent of the female population have smoked cigarettes at some time during their lives, but twentysix percent of these men and eleven percent of these women have stopped smoking. The number of persons who have given up smoking is increasing. Men as a group smoke more than women. Among both men and women the age group with the highest proportion of smokers is the age group 24～44. Income, education and occupation play a part in determining a person's smoking habits. City people smoke more than people living on farms. Well-educated men with high incomes arc less likely to smoke cigarettes than men with fewer years of schooling and lower incomes. On the other hand, if a well-educated man with a higher income smokes at all, he is likely to smoke more packs of cigarettes every day. The situation is somewhat different for women. There are slightly more smokers among women with higher family incomes and higher education than among the lower income and lower educational groups. These more highly educated women tend to smoke more heavily. Among teenagers the picture is similar. There are fewer teenage smokers from upper-income, well-edu-cated families, and from families living in farm areas. High school students who are preparing for college are less likely to smoke than those who do not plan to continue their education after high school. Children are most likely to start smoking if one or both of their parents smoke.

单选题The original kites were used ______.

单选题We can learn from the text that the driver is .

单选题In the west, people make ______ a rule to send Christmas present to their relatives and friends.

单选题--Would you change this bucket for another? It ______ hold water.--OK. I'm really sorry.

单选题Whatisthemaintopicoftheconversation?

单选题How long has the man been in America?

单选题How much do the woman's parents pay each semester (学期)?

单选题There are______dressmakers in the U. S. than in European countries.[A] far fewer[B] so fewer[C] very fewer[D] too fewer

单选题There are many streets in London containing shops dealing in book-selling. (36) the best known of these is Charing Cross Road in the very. (37) of London. Here bookshops of all sorts and sizes (38) to be found, from the celebrated one which (39) to be "the biggest bookshop in the world" to the (40) dusty places which seem to have been (41) over from Dickens's time. Some of these shops (42) , or will obtain (获得), any kind of book, but many of (43) feature (特征,特写) secondhand books, art books, foreign books or books on philosophy (哲学), politics or any other of the (44) subjects about which books may be written. One shop in this area specializes only (45) hooks about ballet(芭蕾舞)! (46) it may be the most convenient place for Londoners to (47) books, Chafing Cross Road is not the cheapest. For the (48) cheap secondhand books, the collector must try some (49) places, to Farringdon Road, for example, in the East central (50) of London. Here there is nothing so magnificent as bookshops. (51) the book- sellers come along each morning and throw out their (52) of books on to small carts which line the road. 53 the collectors, some professional (职业的，专业人员) and some amateur (业余的, 业余爱好者) , who have been (54) for them, rush upon the dusty books. In places like this one can still, (55) pick up for a few pence an old edition that may be worth many pounds.

单选题______ !There's a little pool on your side.

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单选题Which of the four persons listed below is NOT mentioned as adviser?

单选题Li Ming did not pass the exam, ______.

单选题Whycan'tStellaplay?

单选题Hill has never been on time,______?

单选题—Our vacation was Yes, I'ye never had ______.[A] greatly.., a good vacation[B] very good.., the best vacation[C] so great.., a better vacation[D] such great.., the better vacation