题目内容
B. does she go
C. she went
D. did she go
It’s a sure sign that summer is over and winter is on the way — leaves that were once deep green turn red, yellow and bright orange. It happens every autumn. But did you ever wonder why?
The leaves start changing color when the nights start getting longer and the temperature starts getting cooler. Some scientists think that as the number of daylight hours shrinks, the leaves stop making chlorophyll which makes plants green. The reason is that the process of making chlorophyll requires sunlight. But according to horticulture (园艺) educator Susan Rose from Colorado State University, it turns out leaves don’t really change color at all. “The fall colors are actually there all along,” she said. “But they are covered by the green chlorophyll. As the chlorophyll stops being produced, the other colors can shine through.”
The kind of color that the leaves are going to change to is determined by the plant’s genetic (基因的) background. In some places, the leaves start changing color in September — before autumn even officially begins. In other places, they don’t change until late October or even November. Some scientists say the leaves have been changing color later than usual in recent years. And they think global warming has something to do with that.
In one study, researchers found that the growing season in the Northern Hemisphere was nearly a week longer, on average, in 2008 than it was in 1982. And a professor from Harvard University found that the leaves, west of Boston, Massachusetts, are changing color about three days later than they used to. However, other scientists disagree with the global warming theory. Susan Rose said the leaves in her part of Colorado are changing “right on schedule.” But the leaves in other parts of that state are running a little late. “The lateness in the mountains may have something to do with the really warm late summer and early fall,” she said. “But I’m afraid that’s just a guess.”
【小题1】According to Susan Rose, _____.
| A.the fall colors are always in leaves |
| B.leaves make chlorophyll all the seasons |
| C.leaves’ changing color have nothing to with the weather |
| D.leaves begin changing color because they start making chlorophyll |
| A.reduces | B.increases | C.lasts | D.appears |
| A.genetic background | B.dry weather |
| C.global warming | D.low temperature |
| A.why leaves change color at fall |
| B.leaves change color at different time |
| C.the effects of the global warming on plants |
| D.different opinions on the lateness of leaves’ changing color |
The first day of school we were interested to get to know a new classmate.I looked around when a gentle hand touched my shoulder.I found a little old lady with a warm smile.
She said,“Hi ! I’m Rose.I’m 87 years old.Can I give you a hug?”I laughed and I heartily responded,“Of course!”
“Why are you in college at such a young,innocent(天真无邪的)age?”I asked.
She jokingly replied,“I’m here to meet a rich husband,get married,have children, and then travel around.”
“Not seriously,”I asked.I was curious why she took on this challenge at this age.
“I always dreamed of having a college education and now I’m getting one!”she told me.We became instant friends.
Over the year,Rose became a campus icon(偶像) and she easily made friends wherever she went.She loved to dress up and she enjoyed the attention from the other students.
At the end of the semester,we invited Rose to speak at our football banquet. I’ll never forget what she taught us.
“We do not stop playing because we are old; we grow old because we stop playing.Here are the secrets to staying young.You have to laugh and find humor every day.You’ve got to have a dream.When you lose your dreams,you die.Unfortunately we have many people like this walking around?”she said.
“There is a huge difference between growing older and growing up.Anybody can grow older.That doesn’t take any talent or ability,”she added.“But growing up requires finding the opportunity in change.Have no regrets.The elederly usually don’t regret what they did,but rather things they did not do.”
One week after graduation that year,Rose died peacefully in her sleep.She taught us by example that__________________.
1.Why was Rose in college at 87? Because .
|
A.she wanted to meet a rich husband |
|
B.she wanted to get married and have children |
|
C.she wanted to travel around |
|
D.she dreamed of having a college education |
2.According to the passage,Rose loved to do the following EXCEPT .
|
A.dress up |
|
B.enjoy the attention from the other students |
|
C.play football |
|
D.make friends |
3.According to what Rose said,we can know that to stay young you must not .
|
A.laugh |
B.be humorous |
|
C.have a dream |
D.lose your dream |
4.According to the last paragraph but one we know .
|
A.growing older is quite different from growing up |
|
B.growing older needs talent |
|
C.growing up doesn’t require ability |
|
D.the elderly usually have no regrets |
5.Which of the following can be used to fill in the blank at the end of the passage?
|
A.where there is a will, there’s a way |
|
B.never too late to learn |
|
C.Study hard and you will be young |
|
D.never too late to be all you can possibly be |