题目内容
A plant makes its own food in its leaves . Water comes to the leaves through the roots . Air gets into the leaves through very small holes . The green coloring in the leaves uses the water and air to make the food for the plant . It also needs sunshine because a plant can make food only when the sun is shining.
Animals and people could not live without green plants . They both eat plants . People and some animals also eat the meat of some animals and these animals eat plants
- 1.
A plant gets food from________
- A.the sun
- B.its leaves
- C.its roots
- D.the air
- A.
- 2.
What does the green coloring use to make the food for a plant?
- A.Sunshine ,water ,air and the roots
- B.Air ,sunshine and water
- C.Water ,air and meat
- D.Water ,sunshine and animals
- A.
- 3.
A plant has very small holes in its leaves for__________ to come in
- A.air
- B.water
- C.sunshine
- D.green coloring
- A.
- 4.
A plant can make its food when it is _______
- A.cloudy
- B.rainy
- C.sunny
- D.windy
- A.
- 5.
People would die without________
- A.animals
- B.meat
- C.plants
- D.leaves
- A.
1.根据文章内容A plant makes its own food in its leaves可知答案为B
2.根据文章内容he green coloring in the leaves uses the water and air to make the food for the plant . It also needs sunshine because a plant can make food only when the sun is shining.可知答案为B
3.根据文章内容Air gets into the leaves through very small holes可知答案为A
4.根据文章内容It also needs sunshine because a plant can make food only when the sun is shining.可知答案为C
5.根据文章内容People and some animals also eat the meat of some animals and these animals eat plants可知答案为C
Plants are very important. This is because plants can make food from air, water and sunlight. Animals and man cannot make food from air, water and sunlight. Animals can get their food by eating plants and other animals. Man gets his food by eating plants and animals, too. So animals and man need plants to live. This is why there are so many plants around us.
There are two kinds of plants: flowering plants and non-flowering(无花) plants. Almost all the trees around us are flowers and fruit. Non-flowering plants don’t grow flowers. You can’t see many non-flowering plants around you.
If you look carefully at the plants around you, you’ll find that there are many kinds of plants. Some plants are very big and some very small. Most of them are green. We can live on the earth because of the plants around us.
【小题1】Which of the following is the most important according to the passage?
A.Man. | B.Plants. | C.Animals. | D.Air, water, and sunlight. |
A.plants can grow easily | B.plants are green |
C.we can get what we need from plants | D.we like all kinds of plants |
A.much fewer | B.much more | C.much larger | D.much better |
A.Basket. | B.Bread. | C.Cabbage. | D.Stone Forest |
A.Food from Plants | B.Plants Make Food |
C.Man and Animals | D.Plants around us |
Sugar—free beets(甜菜)that still taste sweet, tastier tomatoes and brighter-colored fruits and vegetables that stay ripe(熟的)longer are all foods that are being grown now. How can they
carry traits, such as being tastier, brighter, and riper? They are genetically engineered.
Genetic engineering(基因工程)is like making a change in a recipe. For example, when you make cakes, you mix together all of the usual ingredients. If you add an extra ingredient, like salt, the cakes will taste differently.
Genes are ingredients in the recipe for life. They carry the traits of living things. Your genes dictate what color hair and eyes you’ll have, how tall you’ll be, as well as many other traits. Genes carry traits for plants, too. By adding genes to a plant, you can sometimes create new traits. For example, adding a certain gene to a potato plant can make the potato plant distasteful to bugs(虫子). This makes some farmers happy because they don’t have to use chemicals to keep bugs away from their plants.
It sounds great, but some people are opposed to the idea of food that is genetically engineered. Ronnie Cummins, from the Campaign for Food Safety, is against it. He says that one of the major concerns is allergies(过敏). Supermarkets don’t always label foods that are genetically engineered. A customer could unknowingly buy food that has an added gene from another plant that he or she is allergic to. It could be dangerous.
Gary Burton from Monsanto, a seed(种子)company that engineers food, disagrees. He says his company tests for allergies. Burton believes that genetic engineering is a valuable tool for making better food. The technology can help farmers use less insecticide(杀虫剂)and grow healthier crops. Burton thinks there are many advantages.
But Cummins says that we just don’t know what will happen in the future if we keep adding genes to foods. We could mistakenly create a monster.
People have different opinions about genetic engineering. One side supports it and thinks it will only help us. The other side is opposed to playing with nature and fears health risks. Which side do you think is right?
【小题1】What could be a good thing about food that is genetically engineered?
A.It’s more expensive. |
B.It could taste different. |
C.It requires less insecticide. |
D.It’s not labeled in the supermarket. |
A.People from seed companies. |
B.Farmers who use engineered seeds. |
C.People from the Campaign for Food Safety. |
D.Scientists who create genetically engineered food. |
A.growing genetic foods will make farmers richer |
B.people will eat more genetic foods in the future |
C.using fewer chemicals could make the food tastier |
D.there could be unknown dangers about genetic foods |
A.Future Farming |
B.Genetic Engineering |
C.Foods with a Difference |
D.Genetically Engineered Fruits |