未分类题

第二节完型填空
阅读下面短文，从短文后所给各题的四个选项(A、B、C和D)中选出能填入相应空白处的最佳选项。
Knowledge and Progress
Why does the idea of progress loom so large in the modern world ? Surely because progress of a particular kind is actually 【B1】 place around us and is becoming 【B2】 manifest.
【B3】 mankind has undergone no general improvement in intelligence or morality, it has made 【B4】 progress in the accumulation of knowledgE.Knowledge began 【B5】 as soon as the thoughts of one individual could be communicated 【B6】 another by 【B7】 of speech.
【B8】 the invention of writing, a great advance was made, for knowledge could then be not only communicated but also 【B9】 . Libraries made education 【B10】 , and education in its turn added 【B11】 libraries: the growth of knowledge followed a kind of compound interest law, 【B12】 was greatly enhanced by the invention of 【B13】 . All this was comparatively slow until, with the coming of science, the tempo (速率) was suddenly 【B14】 .Then knowledge began to be accumulated according to a systematic plan. The trickle became a stream; the stream has now 【B15】 a torrent. Moreover, 【B16】 soon as new knowledge is acquired, it is now turned 【B17】 practical account. What is called modem civilization is not the result of a 【B18】 development of all men's nature, 【B19】 of accumulated knowledge applied 【B20】 practical lifE.
【B1】
A.take
B.taken
C.taking
D.to take

A.【B3】
B.
【B8】
C.Then
D.
【B1】
A.take
B.taken
C.taking
D.to

【参考答案】

C
解析：be doing形式。故选C。

<上一题目录下一题>

热门试题

未分类题

Air is a colourless, tasteless, invisible gas that surrounds the planet Earth. It is everywhere on the planet. An 'empty' drinking glass and an 'empty' room, to give two examples, are not really empty. Each is filled with air. When the glass is filled with water, the water pushes the air out of the glass.Air as a gas, has no definite (一定的) shape, hut, because it is matter, it takes up spacE.It is easy to prove that air is something that takes up spacE.Stuff a dry handkerchief into the bottom of a glass so that it will not fall out when the glass is turned upside down. Push the upside-down glass, hold straight up and down, into a jar of water till the glass is completely covereD.When the glass is taken out of the water, the handkerchief will be dry. The air inside the glass took up space and kept the water from coming in.What's the article mainly about?A.Air is a kind of gas.B.Air is invisiblE.C.Air is everywherE.D.Air takes up spacE.

A.B.
What's
C.Air
D.
B.Air
E.
C.Air
F.
D.Air

未分类题

Bees and ColorOn our table in the garden we put a blue card, and all around this blue card we put a number of different gray cards. These gray cards are of all possible shades of gray land include white and black. on each card a watch-glass is placed .The watch-glass on the blue card has some syrup (果汁) in it; all the others are empty. After a short time bees find the syrup, and they come for it again and again. Then, after some hours, we take away the watch-glass of syrup which was on the bluecard and put an empty one in its placE.Now what do the bees do? They still go straight to the blue card, although there is no syrup therE.They do not go to any of the gray cards, in spite of the fact that one of the gray cards is of exactly the same brightness as the blue carD.Thus the bees do not mistake any shade of gray. for bluE.In his way we have proved that they do really see blue as a color.We can find out in just the same way what other colors bees can seE.It turns out that bees can see various colors, but these insects differ from us as regards their color-sense in two very interesting ways. Suppose we train bees to come to a red card, and, having done so, we put the red card on the table in the garden among the set of different gray cards. This time we find that the bees mistake red for dark gray or black. They cannot distinguish between them. This means that red is not a color at all for bees; for them it is just dark gray or black.That is one strange fact; here is another. A rainbow is red on one edge, violet on the other. Outside the violet of the rainbow there is another color which we cannot see at all. This color beyond the violet, invisible to us, is called the ultra-violet. Although it is invisible, we know that the ultra -violet is there because it affects a photographic platE.Now, although we are unable to see ultra -violet light, bees can do so; for them ultra -violet is a colon Thus bees see a color which we cannot even imaginE.This has been found out by training bees to come for syrup to various parts of a spectrum, or artificial rainbow, thrown by a prism on a table in a dark room. In such an experiment the insects can be taught to fly to the ultra-violet, which for us is just darkness.Experiment with bees described in the first and second paragraphs tell us that bees regard blue as a colonA.TrueB.FalseC.Not mentioned

A.The
B.
Now
C.
We
D.
That
E.
Experiment
F.True
B.False
C.Not