单选题What is happening is a survival-of-the-fittest struggle affecting ______ smaller factories in relatively low-tech, labor-intensive industries.

单选题In the 1930s, many people in America were out of work. Alfred Butts was one of them. He was interested in word games, so he made a game which he called "Lexico".But he was not fully satisfied with the game, so he made a few changes to it and changed its name from "Lexico" to "Alph" and then to "Criss Cross". He wanted to make some money from his new game but he didn't have any real commercial (商业性的)success. In 1939, Butts met a man called Jim Brunot who showed an interest in the new game. The two men worked together to develop the game. And in 1948 they began to sell it in the United States under its new name — "Scrabble". At first, it didn't sell very well. In the first year it sold just 2,250 sets and by 1951 it had only reached 8,500 sets a year. Then, in 1952 the manager of Macy's department store in New York, Jack Strauss, happened to play "Scrabble" while he was on holiday. He thought it was a wonderful game, and he believed that Macy's should stock(储备) the game and try to let people know it. At last, "Scrabble" became a big success in the United States and it soon spread to Australia and then to other English-speaking countries.

单选题Weighing seven hundred pounds, ______. A. she could not move the piano B. the piano should not be moved C. the piano was unable to move D. the piano was too heavy for her to move

单选题We are interested in the weather because it (21) us so directly-what we wear, (22) we do, and even how we feel. Geographers, however, are (23) interested in climate than in weather. Climate is the pattern of all the weather conditions over a long period of time. Generally (24) , climate (25) to these normal weather conditions, not (26) daily or yearly changes. Climate, like weather, changes (27) time. It is true (28) these changes (29) a long time, but not as long as we might expect. Records show that over the centuries large portions of the earth have experienced great changes (30) climate.

单选题Which of the following is NOT an opinion expressed by Magdalena Smith?

单选题We cannot entertain your suggestion ______ it does not seem workable. A．because B．for C．so D．therefore

单选题The doctor told him to be careful when taking sleeping pills because too many could be.

单选题There is no ______ to the house from the main road. A. access B. avenue C. exposure D. edge

单选题Possessing a car gives a much greater degree of ______, enabling the driver to move around freely.

单选题He ______ there for half an hour. Let's hurry!

单选题Scientists have been struggling to find out the reason behind blushing （脸红）。Why would humans evolve（进化） a 21__________ that puts us at a social disadvantage by 22__________ us to reveal that we have c

单选题Our corporation's obligation under this ______ is limited to repair or replacement.

单选题If you speak slowly and clearly, the students will ______ the meaning.

单选题The public opinion was that the time was not ______ for the election of such a radical candidate as Mr. Jones.

单选题These machines are better than______we turned out last year.

单选题In scores of experiments, scientists are changing the genetic endowments of plants and animals, and the results could______ a revolution in farm fields, feedlots and dairy barns.

单选题Jim cooperated on the condition that he would be ______ from prosecution.

单选题What does the author mean by saying "they know better now"?