I would appreciate_____ very much if you could give me some advice on TOEFL.

　 A. it　　 B. you　　C. that　D. this

 .---- My grandfather walks five miles every morning.

  -----Really? No wonder he looks so ______.

  A.intelligent     B. enthusiastic    C. nervous   D. energetic

He walked directly towards her, and spoke to her in a low voice to avoid _____ by others.

 A. to hear   B. hearing   C. to be heard   D. being heard

---I have never used the computer for shopping.Is it hard to use?

 ----No, it’s simple. You can follow the ____ carefully.

 A. introduction   B. intructions    C.description      D. corrections

_____ all my teachers, Mr. Moore is the one who impresses me most.

      A. At            B. On           C. To              D. Of

 Hurry up!  The train ______. You know it ______ at 8:30 am.

  A. leaves; leaves  B. is leaving; is leaving  C. leaves; is leaving  D. is leaving; leaves

In recent days ,with the help of our teacher , I have made ___ great progress in _____mathematics.

 A. a; the     B. / ;/       C. / ; the      D. a ; /

 请根据以下提示，并结合事例，用英语写一篇短文。

   No matter how bad things get, something good is out there, just over the horizon.

注意： 1. 无须写标题；

       2. 不得透露个人信息和学校名称；

       3. 词数120 左右。

    When older honeybees take on tasks usually handled by younger bees, aging of their brains is effectively

changed, a new study finds. The discovery suggests that in humans, social involvement ought to be considered

in addition to drugs as a way to treat age-related dementia(痴呆).

    “We knew from previous research that when bees stay in the nest and take care of larvae—the bee

babies---they remain mentally able as long as we observe them,” explained Gro Amdam, who led the research

at Arizona State University. “However, after a period of nursing, bees fly out gathering food and begin aging

very quickly.”

     “After just two weeks, foraging(觅食的)bees have worn wings, hairless bodies, and more importantly,

lose the brain function—-basically measured as the ability to learn new things,” Amdam said in a statement.

     Amdam and his colleagues wanted to find out what would happen if they “asked” the foraging bees to

take care of larval babies again. To find out, they removed younger nurse bees from a nest, leaving the older

foraging bees to face a choice: forage or care for the larvae. Some of the older returned to searching for food,

and others switched to caring for the nest and larvae. After ten days, about fifty percent of the older bees that

had chosen to care for the nest and larvae had “greatly improved their ability to learn new things.”

    The researchers also discovered changes in the proteins in the brains of the bees whose learning ability had

improved. One of the proteins that changed, called Prx6, is also found in humans and is known to help protect

against dementia.

    “Maybe social involvement is something we can do today to help our brains stay younger,” Amdam says.

“Since the proteins being researched in people are the same proteins bees have, these proteins may be able to

respond to specific social experiences.”

     Other studies have shown several non-drug methods can help improve brainpower in older people,

including going for walks and taking music lessons.

     The findings, announced this week, are detailed in the journal Experimental Gerontology.

81．What does the underlined word “they” in Paragraph 4 refer to? （No more than 5 words）

82．When do the brains of older bees age very fast? （No more than 9 words）

83．What is Amdam’s suggestion for old people to prevent dementia? （No more than 6 words）

84．What is the best title for the text? （No more than 6 words）

A professor of environmental health and his students began studying the idea of rooftop gardening for cities. “I think vertical farming is an idea that can work in a big way,” said Despommier.

    Why would we want to build skyscrapers filled with vegetables when we’ve been farming on the ground for 10,000 years? Because as the world’s population grows—from 7 billion now to as much as 9 billion by 2050—we could run out of productive soil and water. Most of the population growth will occur in cities that can’t easily feed themselves. And the fact is that modern agriculture as well as everything associated with it – chemical fertilizers and transportation full of carbon—is a significant contributor to climate change, and suddenly vertical farming doesn’t seem so magic in the sky.

   “Vertical farming could allow food to be grown locally and sustainably,” says Glen Kertz, CEO of Valcent. The result saves space — vital in urban areas — and allows farmers to irrigate and fertilize with far less waste.

At Valcent’s El Paso lab, crops grow in rows on conveyor belts. Moving them gives the plants the precise amount of light and nutrients needed, letting them grow 15 times as much vegetable as on a normal farm with 5% of the water that traditional agriculture does.

Despommier plans to build a 30-story, city-block-size vertical farm that would have transparent walls to maximize sunlight and would produce enough food for 50, 000 people. But it would cost hundreds of millions to build a full-scale skyscraper farm. That’s the main drawback: construction and energy costs would probably make vertically raised food more costly than traditional crops.