Help others whenever you can _______ you will earn respect from others without difficulty.
A. and B. or C. unless D. but
The Internet celebrated its birthday on September 2nd, by which time 40 years _______ since the first successful transfer of data between two computers.
A. has passed B. had passed C. passed D. have passed
—— I haven’t seen Johnson these days.
—— I think she _______ a conference in Beijing, but I’m not sure.
A. should be attending B. might be attending
C. could have attended D. must have attended
The use of Chinese by teachers in ______ English classroom must be restricted because it will decrease _______ time when students are exposed to the English language.
A. the; / B. an; / C. /; the D. an; the
SECTION C
Directions：Write an English composition according to the instructions given below in Chinese．
近几年中小学生近视人数大幅增加，据报道多达30%—50%的中小学生戴眼镜，而且这一数字还在呈上升趋势。保护视力必须得到广泛重视。
你作为一名学生，请根据自身体会用英语写一篇有关保护视力的短文。词数120词左右，短文的标题和开头已经给出。内容要点如下：
1、综述中小学生的视力现状。
2、分析造成学生近视 (short-sightedness) 的主要原因。
3、介绍视力保护的简便方法。(至少2个方法)
SECTION B
Directions: Read the following passage. Answer the questions according to the information given in the passage and the required words limit. Write your answers on your answer sheet.
Motherhood may make women smarter and may help prevent dementia(痴呆) in old age by bathing the brain in protective hormones , U.S. researchers reported on Thursday.
Tests on rats show that those who raise two or more litters of pups do considerably better in tests of memory and skills than rats who have no babies, and their brains show changes that suggest they may be protected against diseases such as Alzheimer’s(早老痴呆症). University of Richmond psychology professor Craig Kinsley believes his findings will translate into humans.
“Our research shows that the hormones of pregnancy(怀孕) are protecting the brain, including estrogen(雌激素), which we know has many neuroprotective (保护神经的) effects,” Kinsley said.
“It’s rat data but humans are mammals just like these animals are mammals,” he added in a telephone interview. “They go through pregnancy and hormonal changes.”
Kinsley said he hoped public health officials and researchers will look to see if having had children protects a woman from Alzheimer’s and other forms of age-related brain decline.
“When people think about pregnancy, they think about what happens to babies and the mother from the neck down,” said Kinsley, who presented his findings to the annual meeting of the Society of Neuroscience in Orlando, Florida.
“They do not realize that hormones are washing on the brain. If you look at female animals who have never gone through pregnancy, they act differently toward young. But if she goes through pregnancy, she will sacrifice her life for her infant—that is a great change in her behavior that showed in genetic alterations(改变) to the brain.”
81. What is the main idea of this passage? （回答词数不超过10个）
_________________________________________________________
82. What can protect the brain of a woman according to the passage? （回答词数不超过4个）
_________________________________________________________
83. How do scientists know “Motherhood may make women smarter”? （回答词数不超过8个）
_________________________________________________________
84. “It’s rat data but humans are mammals just like these animals are mammals.” What does the sentence suggest? （回答词数不超过13个）
_________________________________________________________
