A、They serve as an important energy source. B、They provide material for daily life. C、They produce oxygen so we can breathe. D、T

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问题  
I love trees because they have many different shades of green, so many that it’s almost impossible to count. When I paint a picture of a tree I use many shades of green and many more shades of brown. My favorite thing about trees is that they always seem to have a glow around them. I love trees because they always smell so fresh and clean. I like to go to the nursery because I 1ove the smell of trees, it’s so refreshing. It’s a glass of cool water on a hot day, or a damp cloth on a hot forehead.
    One of my favorite things about trees is that they are fun to climb. I started climbing trees when I was very little. I especially like to climb my grandpa’s apple tree. I love to wind through the branches, and climb up to a board that has been placed there. Once up, I like to think and relax, or bring a book up there with me. It’s fun to let my imagination run away with me while eating apples.
    I love trees in the autumn when they display their beautiful colors. In the autumn time, splashes of red, yellow, orange, and green decorate the mountainsides. The maples go red, the oak and aspen go yellow while the evergreens maintain their beautiful shade of green.
    Trees make life possible because they use the carbon dioxide and release oxygen which makes it so that we can breathe. If we exterminate trees, the effects could be fatal. There may be global warming, lack of oxygen, and we would definitely not have any lumber or paper.
12. What does the speaker do when painting pictures of trees?
13. What aspect of trees is the speaker referring to when saying that "It’s a glass of cool water on a hot day"?
14. What does the speaker like doing in the grandfather’s tree?
15. According to the speaker, how do trees make life possible?

选项 A、They serve as an important energy source.
B、They provide material for daily life.
C、They produce oxygen so we can breathe.
D、They can adjust the climate.

答案C

解析 根据选项的描述,联系上几道题的选项,可知这道题的主题是“树”,因此,主语they指的是trees。短文提到,树木为生命提供可能,是因为它们吸收二氧化碳和释放出氧气,使我们能呼吸,故答案为C。每项的描述本身都没有错,估计问题规定了某些范围或条件,解题的关键是有针对性地回答问题。
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