上海初三英语首字母初级训练

1、1Did you know that bacteria (细菌) live everywhere?They live in the soil and the water. They live in plants and every living thing. They e_1_ live on and in the bodies of animals and people.Can you find and p_2_ at the bacteria on your body now?No way! You cant see these tiny single-celled living thin

2、gs without a microscope (显微镜).However, you know they are there. Sometimes, bacteria in the water or soil can be h_3_. They cause diseases in people, plants, and animals. In h_4_, bacteria can cause sicknesses like ear infections (感染). In plants, bacteria work as decomposers (分解体). However, bacteria

3、can be h_5_ too. Some scientists h_6_ bacteria in the environment to do good things. For example, they put bacteria into polluted environments to get r_7_ of industrial waste. And bacteria are used to clean up sewage and oil spills.2All sounds make waves.When you hear your friends voice, these sound

4、 waves go into your e_1_ and you can identify (识别) your friends voice.U_2_, we cannot see sound waves but we can if we use some simple m_3_. Put a piece of tissue (纸巾) close to your 1_4_ and speak. Then you can see the tissue moving when you speak. If you speak loudly, the tissue moves more, and if

5、you speak softly, the tissue moves less. This happens because the sound waves have vibration (振动).In s_5_, there are names for different sound waves. When the sound vibration is s_6_, we call this a low-pitch (低音调) sound. But when the sound vibration is fast, we call this a high-pitch sound.Pitch d_

6、7_ how high or low a sound is. When the sound has less energy, we say it has a soft volume (音量). But when the sound has more energy, we say it has a loud volume. Volume is a measure of how loud or soft a sound is.3Stepping into a pool of water is common enough, but who could ever imagine stepping in

7、to a pool of fish? In February of 1974, Bill Tapp, an Australian farmer, saw a rain of fish that covered his farm. How s_1_ he must have been!What c_2_ this strange occurrence? This is a question that has long puzzled people who study fish. The answer t_3_ out to be a combination of wind and storm.W

8、hen it is spring in the northern part of the world, it is fall in Australia. T_4_ the autumn season, terrible storms arise and rains flood the land. The strong winds s_5_ over Australia like huge vacuum cleaners (吸尘器), collecting seaweed (海草), pieces of wood, and even schools of fish. Strong winds m

9、ay carry these bits of nature for many miles before dropping them on fields, houses, and astonish people.Although they seem u_6_, fish-falls occur frequently in Australia. When Bill Tapp was asked to describe the scene of fish, he remarked, They look like millions of dead birds falling down. His sta

10、tement is not surprising. The wonders of the natural world are as common as rain. Nature, with its infinite wonders, can c_7_ waterfalls that flow upward and fish that fall out of the sky.4Lise woke suddenly and felt the floor shaking under her bed. She could hear a roaring noise, like a hungry lion

11、, or like thunder. But there arent any lions in Switzerland, and the sky was quite clear.She jumped out of bed and ran to the window. Half a metre of snow had f_1_ in the night. It almost blocked her view of the Matterhorn, a beautiful mountain.Just o_2_ the house was a steep snowfield. A huge mass

12、of snow was sliding down the slope. Trees in its path broke like matchsticks. Sometimes, big r_3_ came down in the snow. The roaring noise was terrifying.It looked as if it was coming s_4_ towards Lises house, but in fact, there was a n_5_ valley between it and the slope. The snow fell into this val

13、ley with a noise like exploding bombs.Lises little brother came into the room and watched with her. They had seen avalanches (雪崩) before, but this one was the biggest. But in a few minutes, the roaring stopped, and the mountain went back to being a s_6_ and majestic giant.Lise and Stefan were alone

14、in the house. Their parents were visiting their grandparents in the city. Lise liked being in c_7_, and deciding what to cook. Today, she was going to make a big pizza. But she needed lots of things from the shop in the village.5Every 30 seconds there is an earthquake. But dont worry because most ar

15、e so w_1_ that they can t be felt. Only a few big ones h_2_ people.If you are indoors during an earthquake, h_3_ under a desk. Stay away from windows and anything that could fall on you.If you are outdoors, move to a c_4_ place. Try to be away from trees, buildings and street lights. These could fal

16、l on you.If you are at home and you s_5_ gas, open the windows and get out of the buildings as quickly as you can. A gas line in your house may be broken. This could be very dangerous.When an earthquake has ended, be careful because aftershocks may still happen. They are just as dangerous as the ear

17、thquake i_6_. So stay under the desk until you make sure its s_7_ to get up.6The earthquake affects the students of the destroyed areas in many ways: losing patents, being scared (恐惧的) and feeling lonely. W_1_ worse, it will affect the teenagers mentally a lot after the earthquake. They will have fe

18、elings of fear, a_2_ and feel they are not safe. They will find it hard to focus (集中注意力). They will tend to cry and shout and tremble (发抖). And they might be a_3_ to be alone. If the teenagers are not helped, they will find it hard to live in a balanced way. If things get worse, they might not be ab

19、le to focus on their studies. They might give up in life. So its very n_4_ to help them overcome (克服) these problems. The first thing is to build up trust with them. Show your sympathy (同情心) and s_5_, and be their friend. Then you have to give them a sense of s_6_. Tell them that theres a s_7_ to ev

20、ery problem. Thirdly, try to satisfy their psychological (心理上的) needs. Be a good listener if he or she needs to talk.7Once upon a time the colors of the world quarreled.All thought that they were the best and most beautiful.Green said: Clearly I am the most important. I am the s_1_ of life and of ho

21、pe. Im the color of grass, trees and leaves. Without me, all animals would die. Blue interrupted: Dont just think about the Earth. What is the color of the sky and the sea? Isnt water the most important thing for life?Yellow laughed: You are all so serious. I bring laughter, h_2_ and warmth into the

22、 world. Every time people look at a yellow sunflower, they start to smile. Without me there would be no f_3_. Orange said at the top of his v_4_: I am the color of health and strength. I carry the most important vitamins (维他命). Think of carrots, pumpkins and oranges. When I fill the sky at sunrise o

23、r sunset, everyone is shocked at my beauty and nobody gives another thought to any of you. Red could stand it no 1_5_, so he shouted: “I am the color of danger and of bravery. I am willing to fight for a cause. I bring fire into the blood.”And so the colors went on quarreling. Their voices became lo

24、uder and louder. The thunder (if) got a_6_ and the rain started to pour. When the colors began to cool the rain said, You foolish colors. Dont you know that each of you is unique? J_7_ hands and follow me.They did what they were told and together made the most beautiful rainbow. 8Birds do not always make their nests in trees or bushes. They dont always use birdhouses. Some birds build their homes in s_1_ places.One bird used a mailbox to make its home. The letter carrier first found the nest when p_2_ a letter int