Although anyone can do it, storm chasing is extremely dangerous. The power of a big storm 31         throw a cow into the air 32         destroy a whole house in seconds. Storm chasers are also often hurt in accidents 33          (cause) by driving in 34         heavy rain. If you are a 35         (begin), it is much safer to join a group for storm-chasing vacations 36____________ the storm season.
However, for storm chasers, it is all worth it . “37                   you get 38            (close)to a storm, it is the most 39             (excite) sight you will 40             see in your life,” says Jasper Morley. “Every storm is an example of the power of nature. It is the greatest show on Earth.”

In ancient times, the most important examination was spoken, not written. In the schools of ancient Greece and Rome, testing usually consisted   31       saying poetry aloud or giving speeches.
Generally, however, modern examinations are written. The written examination, where all students are tested on the same questions, was probably not known 32_________    the nineteenth century. Perhaps it came into   33        (exist) with the great increase in population and the development of modern industry.
Two types of tests are   34         (common) used in modern schools. The first type is sometimes called an “objective” test. It   35   ___________  (intend) to deal with facts, not personal opinions. On objective tests, the student has just one task: he must recognize the correct answer and then he must copy its letter or number onto his examination paper. Sometimes there is   36        answer sheet on which the four letters or numbers are printed. Then the student only has to circle the one         37        go with the correct answer.
For testing some kinds of learning, however , such a test is not very satisfactory. A lively student   38       guess the correct answer without really knowing the material.
For a clearer picture of   39        the student knows, most teachers use another kind of examination in addition to objective tests. They use “essay” tests, and the tests require students to write long answers to broad, general questions. When some essay questions are used along with some objective questions,  40       , a fairly clear picture of the students’ knowledge and ability can usually be obtained.

We may look at the world around us, but somehow we manage not to see it         31        whatever we’ve become used to suddenly  32        (disappear). Take, for example, the neatly-dressed woman I used to see.
For three years, no matter 33         the weather was like, she was always waiting at the bus stop around 8:00 a.m. On 34  ________   (snow) days, she wore heavy clothes and a pair of 35    ____________   (wool) gloves. Of course I remember all 36  _______   only after she was seen no more .It was 37       that I realized how much 1 expected to see her each morning.
“Did she have an accident? Something  38     ______   ?” I thought to myself about her disappearance. Now that she was gone, I felt that I 39   __________   (know) her. I began to realize that part of our daily life probably includes such chance meetings       40  _________   familiar strangers: the milkman you see at dawn, and the twin brothers you see at the library. Such people are important markers in our lives. They add weight to our sense of place and belonging.

In France, most of the people want to have a very long time for lunch. In Britain it doesn’t seem to be important 31             people take a cup of tea and a very quick sandwich and it’s OK.
Another very 32           (surprise) thing for the foreigner is the way the people obey the law — you seem to have much more discipline 33          in France, and you respect the police 34           more than we do. For instance, people park their car 35         , and they know it is forbidden 36            they do it — in Britain people don’t do that.
In England, it’s 37          (easy) to feel alone. People don’t bother you, don’t look after you or worry 38          you so much, so it’s easy to get lost or to hide away here. When you’re in the United States people want to know 39____________     you are, they tend to speak to you, to find out who you are,40         you’re doing.

Alice always wanted to be a singer. Music was the 31          important thing in her life but, to tell you the   32           (true), she took lesson for years, practised every day,  33           in spite of all this, her voice didn't improve. Honestly, it didn’t get better, it just got  34           (loud).
Her teacher finally gave 35         and stopped the lessons, but Alice refused to quit, and one day she decided to give a concert and invited her former teacher to attend.
The teacher was very worried about 36              to say after the performance. She knew it 37            be terrible and it was. She didn't want to tell a lie, but she didn’t want to hurt Alice’s feelings 38               . Finally, she got an idea and went backstage to greet her former pupil.
“Well”, said Alice, “what did you think of 39              performance?”
“My dear,” said the teacher, “you’ll 40         be better than you were tonight.”

The Internet is an amazing information resource. Students, teachers, and researchers use it 31        an investigative tool. Journalists use it to find information for stories. Doctors use it to learn more about unfamiliar diseases and the    32        (late) medical development. Ordinary people use it for shopping, banking, bill-paying, and 33       (communication) with family and friends. People all over the world use it to connect with individuals from 34          countries and cultures.
35        , while there are many positive developments 36        (associate) with the Internet, there are also certain fears and concerns. 37         concern relates to a lack of control over 38         appears on the Internet. With television and radio there are editors to check the accuracy or appropriateness of the content of programs, and with television there are restrictions 39        what kinds of programs can 40          (broadcast) and at what times of the day. With the Internet, parents cannot check a published guide to determine what is suitable for their children to see.

Will there always be 31       water? When you consider how necessary water is to each and every one of us and to all 32     (live) things, and when you observe how man has mismanaged other 33     (nature) resources, you may have reason to worry. Man has badly polluted his sources of water 34    Earth. And he uses more and more water each day. Can man learn to treat 35      (pollute) water for reuse fast enough 36      (keep) pace with the world’s technology and   37    (grow) population?
At the present time there is no serious shortage of water in the United States. Water, however, is not 38     able to meet all the local needs. Some areas, such as the southwestern part of our country, get less rain than 39    . In these areas, water must be brought in from 40      outside. Los Angeles, for example, must obtain its water from sources hundreds of miles away in the Colorado River and the rivers of northern California.

More American people take their troubles with them on holiday, according to a new survey.    31         40 percent said that the main reason for going away is to escape   32          (press) from work, almost all said they worry more      33          they do at home. Only four in every one hundred said that they are happy and free of care.
The most common worry is burglary（入室盗窃）, with four out of ten worrying about their homes   34        (break) into while they are abroad. More than a quarter feel they will feel crazy   35     some other noisy and rough holiday-makers and twenty-two percent worry they may be attacked  36           their possessions will be  37            (miss).
The survey also showed   38         the stay-at-home Americans are no more. Three out of every five want to have a holiday abroad, which was          39    increase from the figures only three years ago. The hotel holiday is still a winner, with about one third of all Americans   40          (prefer) to go on a self-catering（自助） holiday.

Millions of words have been said about young people in the United States. There are reasons   31        this great interest in their ideas,   32       (feel) and actions. Today there are about eight million Americans in the colleges and universities. The young under twenty-five make   33     nearly half of the American population, many of   34      will be in power in the U.S.   35           (nature) their ideas are important to everyone in the country, and    36         is necessary for the older people to understand  37           they think and feel. College students today have strong   38          (opinion) about right and wrong. They are deeply interested in making a   39          (good) life for all the people, especially for those   40     _____ have never been given a fair chance before.

I was on my way to the Taiyetos Mountains. The sun was setting when my car         31   (break) down near a remote and poor village. Cursing my misfortune, I was wondering where I was going to spend the night when I realized that the villagers who had gathered around me were arguing as to  32    should have the honor of receiving me  33   a guest in their house. Finally, I accepted the offer of an old woman who lived alone in a little house. While she was getting me  34      (settle) into a tiny but clean room, the head of the village was tying up his horse to my car to pull it to  35       small town some 20 kilometres away   36      there was a garage.
I had noticed three hens running free in my hostess’s courtyard and that night one of them ended up in a dish on my table.  37            villagers brought me goat's cheese and honey. We drank together and talked   38            (merry) till far into the night.
When the time came for me to say goodbye to my friends in the village, I wanted to reward the old woman 39           the trouble I had caused    40           .