( D )

Millions of stars are travelling about in space. A few form groups which journey together, but most of them travel alone. And they travel through a universe so large that one star seldom comes near to another. For the most part each star makes its journey in complete loneliness, like a ship on an empty ocean. The ship will be well over a million miles from its nearest neighbor. From this it is easy to understand why a star seldom finds another anywhere neat it. We believe, however, that some two thousand million years ago, another star wandering(漫游) through space, happened to come near our sun, Just as the sun and the moon raise tides(潮汐)on the earth, so this star must have raised tides on the surface of the sun .But they were very different from the small tides that are raised in our oceans; a large tidal wave must have travelled over the surface of the sun, at last forming a mountain so high that we cannot imagine it. As the cause of the disturbance(动荡) came nearer, so the mountain rose higher and higher. And before the star began to move away again, its tidal pull had become so powerful that this mountain was torn to pieces and threw off small parts of itself into space.
These small pieces have been going round the sun ever since. They are the planets(行星).

47. Millions of stars are _______________.
A. following a regular path in space B. moving about without a fixed course
C. seldom wandering about in the universe D. always travelling together

48. Some two thousand million years ago, the mountain on the sun was raised probably because
__________.
A. a large tidal wave of a star travelled over the surface of the sun
B. another star happened to come near the sun
C. the sun and the moon raised the tides on the earth
D. the star moved away from the sun

49. The article suggests that _____________ .
A. our earth exists before the sun B. how space formed
C. no one knows where the earth comes from
D. our earth used to be a high mountain on the sun

50. The expression "the cause of the disturbance" refers to _________.
A. the large tidal wave B. the powerful tidal pull
C. the star coming near the sun D. one of the sun's planets

51. In this article, the writer mainly wants to tell the readers __________.
A. that the universe is so large that we cannot imagine it
B. how the high mountains were formed on the sun
C. why the tides over the surface of the sun were so powerful
D. where the planets in the universe came from

( E )

Contacts(交往) between Japan and the rest of the world have grown a great deal in the twentieth century. In the last thirty years, business contacts between Japan and the West have become very important. Many foreign companies now have offices in Japan and Japanese businessmen do business around the world. Differences between Japanese and Western ways of doing business, however, often bewilder the foreign businessman and make doing business in Japan difficult for foreigners.
The American businessman, for example , wants of start talking business mmediately . He wants quick decisions. He does not wait. The Japanese, on the other hand , likes to arrive at decisions gradually after giving them a great deal of thought. Another thing foreign businessmen have difficulty in understanding is when a Japanese means "Yes" or "No". This is because of cultural difference for a Japanese to say "No" directly. In English, it is easy to say "No" to something we do not want to do. But in Japan it is very difficult to say "No". To refuse an invitation or a request with "No", or a similar phrase, is felt to be impolite. It is thought to be selfish(自私) and unfriendly. So instead of saying "No" directly, the Japanese have developed many ways to avoid saying "No". These enable them to avoid hurting other people's feeling. However, this often makes communication with the Japanese difficult for foreigners to understand and follow.