2. 外语
  3. Plants still give us our oxygen. If every plant(51), you’ll die too. Without plants, you can’ t breathe. But you also need energ

Plants still give us our oxygen. If every plant(51), you’ll die too. Without plants, you can’ t breathe. But you also need energ

admin2009-06-15  17
问题 Plants still give us our oxygen. If every plant(51), you’ll die too. Without plants, you can’ t breathe. But you also need energy. You need it to breathe and to move. In fact, you need  (52)to live.
   Some of the first living things couldn’t(53)their own energy. They needed the energy of sunlight, but they couldn’t make it themselves.(54)could they get it? There was only one answer at the(55).
    That is still true today. Animals still have to get their energy from. plants. Plants keep you (56). Sometimes we eat the plants (57). But sometimes an animal eats the plants(58), then we eat the animal.
   Apples and oranges grow on trees—plants. Bread comes from plants in a (59). We get eggs from birds, but the birds eat plants. (Or they eat insects, and the insects have eaten plants. )
   We can eat(60)from a deer, but the deer has eaten plants. We eat (61), and the fish has already eaten plants. (Or it ate other fish—and they ate plants. ) We don’ t eat(62), but we drink milk. And the cow has eaten the grass for us.
   Every part of your food comes from plants. When you eat part of an animal, ask yourself, what did this animal eat? If it ate other animals, ask yourself, what did they eat? You will always(63)a plant.
   So what is really keeping you alive? The green plants of the world are catching sunlight for you. You are using the energy from our own(64).
   You are (65)the sun.
选项 A、sun
B、earth
C、way
D、plants
答案D
解析 据文意可知这些生物是通过植物获取能量的。
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