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Plans grow(46)in almost every part of the world. We see(47)such plants as flowers, glass, and tree nearly every day. Plants grow high on moutaintops, far in the oceans, and in many deserts and(48)polar regions
Without plants, there could be not life on earth. Man could not live without air of food and so he could not live without plants. The oxygen in the air we breathe comes from plants. The food we eat also comes from plants or from animals that eat plants. We build houses and make many(49)useful products from lumber cut from trees. (50) Much of our clothing is made from the fitbers of the cotton plants.
Scientists belive there are more than 350,000 species of plants, but no one knowns for(51)sure. Some of the smallest plants, called diatoms, can be seen only with a(52)microscope . A drop of the water may hould as many as 500 diatoms. The largest living things are the giant sequoia trees of California. Some of them stand more than 290 feet high and measure over 30 feet wide
Scientist(53)divide all living things into two main groups - plants and animals. It is usually easy to tell the two(54)apart . Almost all kinds of plants stay in one place, but nearly all species of animals move about under their own power. Most plants make their own food from air, sunglight, and water. Animals cannot make their own food. The basic units of all life, called cells, are also different in plants and animals. Most plants have thick wall that(55) contain a material called cellulost. Animal cells dl not have this material.
Our oceans are becoming extremely polluted. Most of this pollution comes from the land, which means it comes from people. Firstly, there is raw sewage, which is pumped directly into the sea. Many countries, both developed and developing, are guilty of doing this. Secondly, ships drop about 6 million tons of garbage into the sea each year. Thirdly, there are oil spills from ships. A ship has an accident and oil leaks from the vessel. This not only pollutes the water, but it also kills marine life. Next, there are waste materials from factories. Without proper regulations, factory owners let the waste run directly into the rivers, which then leads to the sea. And finally, oil is washed from land. This can be the result of carelessness or a deliberate dumping of waste.
Fill in the numbered blanks in the passage with ONE suitable word from the box. There is ONE extra word. Write your answer on the answer sheet.
unfortunately also precious but result
worse falls vital caused
Water is one of our most (26) ___ precious ______resources; put it simply, without water there would be no life. Unfortunately, many of us seem to have forgotten this fact, and as a (27) __ result ______ the world is facing the danger of running out of water. The actual amount of water on earth has changed little since the time of dinosaurs. The problem has been (28) ___ caused _____ by people’s misuse of our water supply. This not only means that we have polluted our rivers and seas, but (29) ___ also ______that we are wasting a great deal of this precious resource. (30) ___ Unfortunately _____the destruction of the rain forests has made this problem (31 ) __ worse ______since much of the rain that (32) ____ falls _____is lost because it runs off into the sea. The population of the earth is increasing daily, so it is (33) ___ vital _____ that we find a solution to this problem before it is too late.