Scientists led by Dolly cloner lan Wilmnt advised that Hwang’s data should be investigated inside the______.
Questions 4--8 Complete the following sentences with NO MORE THAN four words for each blank. According to theories before quantum theory, atomic energy could lead to ______.
Have you ever wondered what the sky really is Long ago many thought it circled the earth, carrying the sun, moon, planets, and stars with it. Since then scientists have found that it is really just space. In this space the earth, moon, planets, sun, and other stars are traveling. At times the sky changes its color. When the sun rises or sets, red, orange, yellow, or pink colors are seen. During a clear day the sky is very blue, and on a rainy day it is gray. At night it seems almost black except for the light from the moon and stars. People of old times thought the stars made pictures in the night sky. They saw bears, lions, and many other things. Sailors at sea and shepherds in fields with their sheep knew these. They need only to look. They can go out and view the night sky. No one knows how many stars are there in the sky. They don’t know how far the sky reaches out in all directions from the earth. Each new and larger telescope that is built helps scientists see farther out into space. More distant stars and planets are there to be discovered. Most people like to go up into the sky. They travel in balloons and airplanes. People have gone as far as the moon. Someday they will visit distant planets and beyond. What people of old times actually saw in the night sky were ______.
A. some stars that look like certain things
B. clouds in a rainy day
C. stones hanging in space
D. shadows of the heavenly bodies
Mr. Plummer lived in Winchester, in the South of England. One day, he had to go to London on business, so he bought a second-class return ticket and caught the morning train. After spending the day in London, he reached the station at rush hour, when all the businessmen were going home to the country from their offices in London. The train was already crowded when Mr. Plummer arrived, and he was afraid that he would have to stand up. Then he noticed that there were several empty seats in the first-class compartments and he decided to travel in comfort. He could pay the extra money when the ticket collector came round on the way to Winchester. Mr. Plummer got into a first-class compartment and sat down. There were four other men in the compartment. They all wore dark suits and had the appearance of ordinary, successful businessmen. However, just before the train started, a different kind of person jumped in and sat down. It was a young man who had certainly never worked in an office. Mr. Plummer was surprised to see such a man in a first-class compartment until he remembered how full the train was. The young man had very long hair, and he wore a bright red T-shirt with a large picture on the front. Two of the other men looked up in silence from their newspapers, then started to read again, but their faces showed clearly what they were thinking. Mr. Plummer decided that he was not the only passenger who was going to pay something extra to the ticket collector. About twenty minutes ’after the train started, the door opened and the ticket collector came in. Mr. Plummer had the necessary money ready in his hand, and he held it out with the ticket. The ticket collector then turned to the others. One by one, each of the businessmen held out a second-class ticket, and all had to pay the extra money. But the young man sat still. Had he no ticket at all He had. lie was the only first-class ticket in the compartment. Mr. Plummer thought that ______.
A. the young man didn’t have a first-class ticket
B. the young man had no ticket at all
C. all the other people in the compartment would have to pay extra money
D. the young man was the only person who had a first-class ticket