短文填空。 Whydoleaveschangecolorsinautumn?Weallen...
问题详情:
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
知识点:短文填空
题型:阅读填空