The earth is the only planet that scientists are certain has life .What does the earth have that the other planets don't ? For one thing , the earth has just the right temperature . As _ from the sun , the earth seems to be just the right distance away . The planets that are closer to the sun are so hot that their surfaces bake in the sun . The farthest planets are cold balls . When the earth developed-- which scientists believe may have happened about billions of years ago , many gases covered the earth . The gases caused the earth to be hot . But something wonderful happened . The temperature was just right for thick clouds to form . It rained very hard for a very long time . This gave the earth its oceans . Water made it possible for plants to grow . The plants created oxygen in the atmosphere . Oxygen is the gas that humans and animals breathe . Only one other planet in the solar system seems to be something like the earth . That planet is Mars . Mars is smaller than the earth , and it is quite a bit cooler . But it is not too cold for humans . On some days , the temperatures are as cold as a winter day in the northern United States . If you wore a special spacesuit , you could walk around on Mars . You would have to bring your own air to breathe , though . The air on Mars is too thin to breathe . Mars has the largest volcano in the solar system . It is sixteen miles high . The highest volcano on the earth is five miles high . The most unexpected sight on Mars is dried-up river beds . Scientists believe that Mars was once much wetter that it is now . Does this mean there could have been living things on Mars ? Scientists are not sure , but there has been no sign so far . It is the _ on the earth that makes life possible . A) temperature B) water C) oxygen D) temperature , water and oxygen
D
I was small for my age. I was shy and sometimes it was hard for me to make friends with the others. However, learning came fairly easy for me. I was the best in most of my classes, but PE class was my nightmare and made me feel that I was not as good as the others. Miss Forsythe was our PE teacher. She was young and energetic. Everyone liked her. She said that we all had to come to her classes. No one could hide from Miss Forsythe! One day she told me that she wanted me to play a game with another girl in a PE show. I was rather worried that I wouldn't do a good job when she explained her idea, but she was excited. With her encouragement, I had no choice but to agree. It was a "boy meets girl" game. I played the boy and my classmate, Margaret Ann, played the girl. We were dressed in evening clothes and danced around the floor. According to Miss Forsythe, I had to pick up Margaret Ann when we finished the dance. Since I was not strong enough to pick the tallest girl up, it was she who picked me up. I suddenly felt ten feet tall! It was a huge success and everybody applauded for our excellent performance. What a wonderful ending! Afterwards, I smiled confidently . Miss Forsythe's understanding and willingness to create a place for me in her show (which certainly did not need me) gave me some much needed confidence. She was and always will be my favorite teacher. How did the author feel about the game at first? A) She was excited. B) She thought it would be fun. C) She was glad. D) She was nervous.
D
Q: In 1933 an unknown American called Clarence Nash went to see the film-maker Walter Disney. He had an unusual voice and he wanted to work in Disney's cartoon film for children. When Walter Disney heard Nash's voice, he said, "Stop! That's our duck!" The duck was the now-famous Donald Duck, who first appeared in 1934 in the film, The Wise Little Hen. Donald lived in an old houseboat and worn his sailor jacket and hat. Later that year he became a star after an eight minute Mickey Mouse film. The cinema audiences liked him because he was lazy and greedy, and because he lost his temper very easily. And they loved his voice when he became angry with Mickey's eight nephews. Soon Donald was more popular than Mickey Mouse himself, probably because he wasn't a goody-goody, like Mickey. In the 1930s, 1940s, and 1950s, Donald and his friends Mickey, Goofy and Pluto made hundreds of Disney cartoons. He also made educational film about the place of the USA in the world, and safety in the home. Then in 1966 Donald Duck and his voice disappeared--there were no more new cartoons. Clarence Nash died in February, 1985. But today's Children can still see the old cartoons on the television and hear that famous voice. When did the first Donald Duck film appear? A) In 1933 B) In 1934 C) In 1966 D) In 1965
A: B
(Q).
It is generally believed that we are getting cleaned when we step under a shower. We are, but we're also giving a home to lots of tiny little creatures we didn't even know about. A showerhead carries thousands of bacteria called Mycobacterium.These can cause problems like coughs and tiredness, and a general feeling of poorliness . When you turn on the water, the bacteria go from the showerhead onto and into your body. This is a finding of Norman R. Pace and his team at the University of Colorado, in the US. The scientists investigated bacteria in all kinds of human environment, including showers.Pace's team looked at 45 showerheads in nine American cities. They discovered that 30 percent of them had large amounts of flying Mycobacterium. But Pace said that they _ few threats to the health.Only those with a weak immune system might need to worry.He told the New York Times that the bacteria are not as unpleasant as might be thought.He said that having a shower is no more dangerous than anything else we do in the morning. But for those who feel sick about the idea of all those microorganisms , he had some advice. Let the water run for 30 seconds before getting into the shower. Why? The number of bacteria is smaller than that when the water is just turned on. If that seems like a waste of water, he added that you could also change your showerhead every few months. However, Pace had good news too. He has also been testing the air in US subways. Apart from iron particles , which are ground off the track by the wheels of trains, subway air is fresh. The reason is that a train's movement pumps fresh outdoor air into the tunnels. Pace explained that he wanted to understand the natural microbial environments of public places. This kind of knowledge might help discover the microbes to be used in a bioterrorist attack. What contributes to fresh air in US subways? A) The train's movement. B) Iron particles. C) Train wheels. D) Air conditioners on the trains.
(A).
A