短文填空。           Whydoleaveschangecolorsinautumn?Weallen...

問題詳情：

短文填空。

            Why do leaves change colors in autumn?

We all enjoy the   1  of autumn leaves you ever wonder how and   2  fallen leaves change color ?Where do the yellows and oranges   3   from ?

During winter ,there is not    4  light or water for photosynthesis（光合作用） trees will rest ,and live off the food they   5  during the summer begin to shut down their food-making factories chlorophyll－a green thing in plants ,which can absorb energy （吸收能量）from sunlight and help trees grow ,disappears（消失）from the leaves the bright  6   is gone ,we begin to see yellow and orange colors l amounts （量）of these colors have been in the leaves all along just can’t see them in the summer ,because they are   7   up by the green chlorophyll .

It is the reason that makes the beautiful colors we enjoy   8  each year .

【回答】

1. colors   2. why       3. come  4. enough

5. stored / saved / found

6. green     7. covered 8. them

知識點：短文填空

題型：閲讀填空