Ⅰ. 户外时间
是时候进行户外活动了！本不想进行户外游学的David查阅了资料，了解了保证户外时间的重要性。
Today，young people spend about six hours a day in front of a TV or a computer and less than four minutes playing outdoors. It is not healthy for people's mind and body when they spend more time on technology but not outdoors.
Some health experts call green time “Vitamin G”. Kids who don't get outdoors much seem to have trouble in school. Doctors believe that is because being outdoors excites the mind more than sitting around indoors. Even those who usually spend a lot of time outdoors find a difference when they don't get green time. Madelyne P.，14，says，“I feel more tired when I don't get outdoors.”
Researchers believe the advantages of green time come from the outdoor activities in the free time，such as jogging or boating. Exercise makes something special in brain that can improve learning，mood(情绪)，and sleep. It also develops learning by increasing(增强) connections between nerve cells(神经细胞) that are important in learning and memory. Some schools hold classes outside for these reasons. Student Hannah Smith，18，says she believes the outdoors helps her think and gets her to learn carefully. Learning in a forest sparked her interest in art and photography too.
Even doctors are helping give their patients some Vitamin G. Miller writes “park prescriptions (处方)” for her patients，because she says，“Being outdoors is good for health.” She finds that when she gives patients park prescriptions，they seem to continue with them.
Getting outdoors can be simple，just like calling together your family for a picnic lunch. All it takes is five minutes or more of green time：Get outside，and get your Vitamin G!
1. Which of the following activities is NOT an example of “Vitamin G”?
A. Watching TV.
B. Going hiking.
C. Taking a boat tour.
D. Having a picnic.
2. Researchers and doctors may both agree that
A
.
A. kids without green time are likely to have trouble in school
B. people who get outdoors a lot may feel the same way indoors
C. exercise improves learning by increasing the number of cells
D. Vitamin G may help patients get into the habit of being outdoors
3. What does the passage mainly talk about?
A. The finding of a new vitamin.
B. The good parts of green time.
C. The influence(影响) of technology.
D. A different way of learning.
