Question

    Have you ever really looked at a tree? All trees are big plants. Like all plants,trees have roots. The roots hold trees in the ground. They keep trees from falling over. They bring water and food that trees need to live on.

    A tree has a fat stem.We call the tree’s fat stem“trunk”. Inside the trunk,a tree holds water and food.The water and food go up the trunk to the green leaves. The leaves use sunlight to make more food for the tree.

    Trees help us. They help clean the air. They give us food.Fruits,nuts and chocolate all come from trees. Paper,chairs,beds and houses also come from trees.Trees are also important for other living creatures (生物) . They provide a home for birds and other animals. Many animals eat part of trees. Be friends with trees!We need trees and trees need us!Often young trees need special care. They need water and protection (保护) .

1. What can roots do for trees?

   A. To get sunlight to make food.

   B. To hold trees in the ground.

   C. To bring water and food for trees.

   D. Both B and C.  

2. A tree’s stem can move up       to the leaves.

   A. food   B. water

   C. water and food   D. sunlight

3. Which part of trees can make food for trees?

   A. Roots. B. Stems.

   C. Trunks. D. Leaves.

4. The third paragraph (段落) mainly tells us that       .

   A. trees make food for people

   B. trees are important for everyone

   C. trees provide a home for animals

   D. trees help clean the air

5. Which of the following is WRONG?

   A. Big trees don^ need water or protection.

   B. Part of trees is some animals’ food.

   C. Trees can make food from sunlight.

   D. Trees are a kind of big plants.

Answer 1

1. D  由句子 The roots hold trees in the ground.及 They bring water and food that trees need to live on.可知树根的作用。

2. C  由句子 The water and food go up the trunk to the green leaves. 可知，树茎可把水和食物传给树叶。

3. D  由句子 The leaves use sunlight to make more food for the tree.可知树叶可为树制造食物。

4. B  本段说明了树可以净化空气，可以制造食物，还可以用来造纸、建房等，可见树对每个人都很重要。

5. A  由整篇短文内容可知,大树也需要被保护。