【题目】阅读下列短文,从下面每小题的A、B、C、D四个选项中选出最佳选项。D
| All people know that trees are important to us. Scientists believe our life would not be possible if there are no trees on Earth. |
| People and animals need oxygen to exist. Without it, most living things will die. But where does oxygen come from? Trees. Trees can take in much carbon dioxide and produce oxygen for us to breathe. Too much carbon dioxide is bad for our environment. |
| Trees are a major source of food. Apples, oranges, lemons all come from trees. People and animals knew how to get food from trees many years ago. |
| In fact, many kinds of important medicine come from trees too. Some special things in trees can be used to produce medicine. Also, trees make environments more beautiful and relaxing. They help protect the soil. |
(1)What does the underlined word "exist" mean?
A.Drink.
B.Eat.
C.Live.
D.Work.
(2)Which of the following may damage (危害) our environment?
A.Oxygen.
B.Medicine.
C.Food.
D.Carbon dioxide.
(3)What does the passage mainly tell us?
A.Trees are important to animals.
B.Animals need oxygen to breathe.
C.Trees can help people and animals in many ways.
D.There are few trees in the world now.
(4)Where may we read this passage?
A.In a plant magazine.
B.In medicine instructions.
C.In a storybook.
D.In a cookbook.