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Jawaban: C
Text 4. The following text is for questions no 16–20
In autumn, the colour of the leaves changes into beautiful yellow, red, and brown. Do you know how this happens? To answer that question, first we have to understand about leaves.
Leaves are the food factories of plants. Plants take water from the ground through their roots and they take carbon dioxide from the air. Plants need glucose for energy and for their growth.
The plants use sunlight to turn water and carbon dioxide into glucose. The process is called photosynthesis and the substance that helps this photosynthesis process is called chlorophyll. This chlorophyll makes plants look green.
As summer ends and autumn comes, the days get shorter and shorter. The trees "know" that they have to be ready for winter. During winter, there is not enough sunlight or water for the photosynthesis process. The trees will rest, and use the food that they have stored during summer. The trees begin to close their food factories. The green chlorophyll substance disappears from the leaves. As the leaves begin to lose their green colour, they change into beautiful yellow and orange.
In some trees, like maple tree, glucose is trapped in the leaves after the photosynthesis process stops. Sunlight and cool rights turn the green colour of the leaves into red. Oak leaves become brown because of wastes that are left in the leaves. This combination of red and brown makes the trees look very beautiful in autumn.
16. What is the best title for the text above ...
A. Tree
B. Seasons
C. Photosynthesis
D. The changes of leaves
E. Beautiful Autumn
Jawaban: D
17. A part of trees which is used to take water from the ground is ...
A. branch
B. root
C. leave
D. fruit
E. stem
Jawaban: B
18. When do the trees produce their food ...
