单选题The atmosphere is as much a part of the earth as _______ its soil and water of its lakes, rivers and oceans.A. hasB. doC. isD. are

单选题The policewoman waved her hand and broke ______ the crowds.

单选题How I wish that the engine______ down on our way back home last night.

单选题The author was "utterly confused" because he

单选题Air is to men ______ water is to fish. A.what B.when C.that D.which

单选题 In this section, you will hear several news items. Listen to them carefully and then answer the questions that follow. Questions 21 to 23 are based on the following news. At the end of the news item, you will be given 15 seconds to answer the questions. Now, listen to the news.

单选题He"s a smart businessman who is good at hiding his ______ under a bushel.

单选题 Questions 8 to 10 are based on the following conversation. At the end of the conversation, you will be given 15 seconds to answer the questions. Now listen to the conversation.

单选题Man, even in the lower stages of development, possesses a faculty which, for want of a better name, I shall call Number Sense. This faculty permits him to recognize that something has changed in a small collection when, without his direct knowledge, an object has been removed from or added to the collection. Number sense should not be confused with counting, which is probably of a much later vintage, and involves, as we shall see, a rather intricate mental process. Counting, so far as we know, is an attribute exclusively human, whereas some brute species seem to possess a rudimentary sense akin to our own. At least, such is the opinion of competent observers of animal behavior, and the theory is supported by a weighty mass of evidence, Many birds, for instance possess such a number sense. If a nest contains four eggs, one can safely be taken; but when two are removed, the bird generally deserts. In some unaccountable way the bird can distinguish two from three. But this faculty is by no means confined to birds. In fact, the most striking instance we know is that of the insect called the "solitary wasp." The mother wasp lays her eggs in individual cells and provides each egg with a number of live caterpillars (毛虫) on which the young feed when hatched. Now, the number of victims is remarkably constant for a given species of wasp. Some species provide 5, others, 12, others again as high as 24 caterpillars per cell. But most remarkable is the case of a variety in which the male is much smaller than the female. In some mysterious way the mother knows whether the egg will produce a male or a female grub (幼虫) and apportions the quantity of food accordingly; she does not change the species or size of the prey, but if the egg is male, she supplies it with five victims; if female, with ten. The regularity in the action of the wasp and the fact that this action is connected with a fundamental function in the life of the insect make this last case less convincing than the one which follows. Here the action of the bird seems to border on the conscious. A squire was determined to shoot a crow which made its nest in the watchtower of his estate. Repeatedly he tried to surprise the bird, but in vain: at the approach of man the crow would leave its nest. From a distant tree it would watchfully wait until the man had left the tower and then return to its nest. One day the squire hit upon a trick: two men entered the tower, one remained within, the other came out and went on. But the bird was not deceived: it kept away until the man within came out. The experiment was repeated on the succeeding days with two, three, then four men, yet without success. Finally, five men were sent: as before, all entered the tower, and one remained while the other four came out and went away. Here the crow lost count. Unable to distinguish between four and five, it promptly returned to its nest.

单选题How we look probably worries us more ______ we are in our teens than at any other time in our life.

单选题Most children with healthy appetites are ready to eat almost anything that is offered them and a child rarely dislikes food 21 it is badly cooked. The 22 a meal is cooked and served is most important and an 23 served meal will often improve a child"s appetite. Never ask a child 24 he likes or dislikes a food and never 25 likes and dislikes in front of him or allow 26 else to do so. If the father says he hates fat meat or the mother 27 vegetables in the child"s hearing, he is 28 to copy this procedure. Take it 29 granted that he likes everything and he probably 30 . Nothing healthful should be omitted from the meal because of a 31 dislike. At meal times it is a good 12 to give a child a small portion and let him 32 back for a second helping rather than give him as 33 as he is likely to eat all at once. Do not talk too much to the child 15 meal times, but let him get on with his food; and do not 34 him to leave the table immediately after a meal or he will 35 learn to swallow his food 36 he can hurry back to his toys. Under 37 circumstances must a child be coaxed 38 forced to eat.

单选题We feel it is high time that the government ______ something to curb inflation.

单选题Who looks after the paper, especially the front page, in the afternoon and evening, preparing for the next morning?

单选题It can be inferred from the text that the retail price of petrol will go up dramatically if ______.