题目内容
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Waste can be seen everywhere in the school. Some 1 ask for more food than they can eat, some students 2 to turn off the water taps (水龙头) after they finish washing, and others often forget to turn off the 3 when they leave the classroom. They say these things are cheap, 4 I don't agree with them. Waste can bring a lot of problems. Though China is rich in some resources (资源), we are 5 of others. It is reported that we will have no coal or oil to 6 in 100 years. So if we go on wasting our resources, 7 can we use in the future and where can we move? Think about it. I think we 8 say no to the students who waste things every day. 9 should stop wasting as soon as possible. If we do our best, waste can be stopped 10 and many natural resources can be saved. | ||||
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The Earth is getting warmer because of the activities of people. We cut down and burn 1______ and send gases into the air with our cars and factories. Can we do anything about it? Sure. We may 2______ be leaders or scientists but we can play our part in 3______ the planet. Here are two ideas. Bike, don't ride to school Do you 4______ to school by bus or by bike? If you bike, you are doing 5______ for the Earth. Buses, cars, trains and planes produce a lot of carbon dioxide (二氧化碳). If you live near to your school, 6______ not bike there on warm spring mornings? Or, you can 7______ walk to school to save energy. Wash the green way Do you help your mom and dad wash clothes? Then wash them 8______ an energy-saving way. A recent study by Cambridge University found 9______ 60 percent of the energy used on a piece of clothing is 10______ in washing and drying it. Over ita lifetime, a T-ahirt can send up to 4 kilograms of carbon dioxide into the air. 11______ you wash your own clothes, wash them in cold or warm water to save energy, but not hot water. Wash your clothes when 12______ fill up the machine. Use the most energy-saving machine you can find. Some new ones use as 13______ as one-fourth of the energy of older machines. When they're clean, dry 14______ clothes the natural way, by hanging them 15______ a line rather than putting them in a dryer. In all, you can cut the carbon dioxide used in washing by 90 percent. |
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I can't remember when I started collecting litter. But it was when I got tired of (1)_____ litter nearby and realized that (2)_____ was going to pick it up. I live near a (3)_____ in Enshi, Hubei Province. I can walk there in three (4)_____! I (5)_____ love going there to play with my dog. But one day there was so much litter there that I became very unhappy. I decided I had to clean up the forest. I wanted to (6)_____ happy going there again. I made my (7)_____ trip to clean the forest that afternoon. I took a big black rubbish bag with me. Ten minutes (8)_____ starting to pick up litter, my bag was full! It had cans, bottles, broken glass and newspapers in it. From then on, I went to the forest four times a year to pick up the litter. I often (9)_____ there for three hours. It makes me feel (10)_____ to do something for the environment. After each trip, I (11)_____ all the litter that I've found. If (12)_____ of it is recyclable (可回收的), I keep it. I can't (13)_____ why people drop litter. But I will keep picking it (14)_____ they stop dropping it. I know I am only doing a small bit to help (15)_____, but I still think it is important. | ||||
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We have always been warned of the dangers of forest fires. They cause 1 to a forest. They kill many plants and animals in an eco-system, which is a group of living things and their environment. But have you ever heard of a forest fire that can be 2 for a forest? People start some of the fires with a special reason to actually do good to the eco-system. In fact, fires are a natural part of any eco-system. Without fires, the oldest and largest trees would stop sunlight from reaching the forest floor. Fires can 3 some of these old trees. When the trees die, they provide something good for the earth. New trees can grow strong and healthy in their place. Some trees even need fires to grow. These trees hold their seeds (种子) inside. Heat from a fire allows the coat of the seeds to open up. Then the seeds fall to the ground and have the 4 to grow/ Scientist, who know about nature's needs, start some of these fires, called controlled burns. A fire is started and kept under control. This way, the fire does not spread out of the area or 5 a after forest fires, they can go hungry 6 their food has been damaged in the fire. Small, controlled fires mean than animals will not have to move far to find food. After some time, small plants begin to grow. Animals return soon after the plants return. This 7 makes an eco-system. So the next time you hear about a forest fire, think about the good as well as the bad. It may take a new eco-system a while to return, but it will likely come back stronger and healthier than ever. | ||||
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