单选题Due to circumstances _____ our control the performance had to be cancelled.

单选题When he bent over to untie his shoelace，the __________ of his trousers split．

单选题If you smoke—particularly cigarettes—you are far more likely than a non—smoker to suffer or die from several major diseases—notably lung cancer. One smoker in four dies prematurely (过早地) because of his smoking. The risk of dying for a heavy smoker (between the ages of 35 and 55) is roughly equal to the risk run by a non—smoker 113 years older. Cigarette smoking—and to a lesser degree pipe and cigar smoking—may aggravate(使恶化) or be partly responsible for the development of a wide variety of other diseases ,which include cancers of the mouth and throat ,peptic ulcers (胃溃疡), and loss of teeth. (77) Women who smoke during pregnancy produce babies on average about 5 to 8 ounces lighter than those who don't. Take lung cancer for example: Britain's lung cancer figures are the highest in the world, and rising. Ninety people die every day, 33, 000 in 1969. Almost all these deaths can attributed directly to tobacco smoking. (78)The prospects of a cure for lung cancer are, at present, remote, and it is impossible to estimate when, if ever, someone will find one. You would be foolish to rely on someone finding a cure before you needed it. One man in eight who dies between the ages of 35 and 64 is kill ed by lung cancer. The figures for women in this age group are lower, about 1 in 20. This is partly because women smoke less, and have not smoked as long. But the figures are still very high.

单选题John is not (enough intelligent) (to pass) (this) (economics) class without help.A. enough intelligentB. to passC. thisD. economics

单选题It is no use ______ to remember only grammar rules.

单选题The man was fined because he was caught _____ a tree.

单选题On his way to school yesterday morning, Prof. Wang came across an old friend and stopped talking with him for quite a while. A. On his way B. came across C. stopped talking D. quite a while

单选题I can"t speak Japanese, but I do wish I ______.

单选题______ we need air and water, so we need criticism and self-criticism. A. Even though B. So long as C. Just as D. Now that

单选题I don"t like to disturb you, because you"re quite tired ______ today.

单选题Just after putting away the letter, _____.

单选题The examination I took yesterday wasn't difficult, but it was long.

单选题The development of industry has (also) brought (about) large numbers of problems (which) have (to solve).

单选题__________ need, please bring the dictionary with you.

单选题Lucas: Sorry sweetie. I didn"t hear you. ______? Mary: Look here, this dress has matching belt and shoes. What do you think?

单选题I can hardly ______ the difference between these two words.

单选题What a naughty boy he was. ______.A. Down jumped he from the deskB. From the desk jumped he downC. He down jumped from the deskD. Down he jumped from the desk

单选题The time will come ______ man can fly to ______ he likes in the universe. A. how...where B. when...wherever C. where...where D. what...which