根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

Before going outside in the morning, many of us check a window thermometer(温度计)for the temperature. This helps us decide what to wear. _______71______ . We want our food to be a certain coldness in the refrigerator. We want it a certain hotness in the oven. If we don’t feel well, we use a thermometer to see if we have a fever. We keep our rooms a certain warmth in the winter and a certain coolness in the summer.

Not all the thermometers use the same system to measure temperature. We use a system called the Fahrenheit scale. But most other countries use the Centigrade scale.

Both systems use the freezing and boiling points of water as their guide._____72_______ .

The most common kind of thermometer is made with mercury(水银)inside a clear glass tube. As mercury (or any other liquid ) becomes hot, it expands. As it gets colder, it contracts(收缩). That is why on hot days the mercury line is high in the glass tube.______73______.

First. Take a clear glass juice bottle that has a cap; fill the bottle with coloured water. Tap a hole in the center of the cap using a hammer and thick nail. Put the cap on the jar. Then stick a plastic straw(吸管) through the nail hole.

_______74____________.

Finally. Place a white card on the outside of the bottle and behind the straw. Now you can see the water lever easily.

_______75___________.

As the temperature goes down, the water will contract, and the lever in the straw will come down. Perhaps you will want to keep a record of the water lever in the straw each morning for a week.

A. We use and depend on thermometers to measure the temperature of many other things in our daily lives.

B. Thermometers measure temperature, by using materials that change in the same way when they are heated or cooled.

C. Now that you know this rule you can make a thermometer of your own that will work.

D. The water will rise in the straw. As the temperature of the air goes up, the water will expand and rise even higher.

E. They label these in different ways. On the Fahrenheit scale water freezes at 32 degrees and boils at 212 degrees. On the Celsius scale water freezes at 0 degrees and boils at 100degrees.

F. Take wax (you may use an old candle if you have one) and melt some of it right where the straw is struck into the cap to seal(把..粘住) them together.

G. People use thermometers which are made by themselves when travelling around the world.

The chairman thought_____necessary to invite Professor Smith to speak at the meeting.

A. that    B. it      C. this    D. him

You will find as you read fiats book that you just can't keep some of these stones to ______. You will want to share them with a friend.  

A. itself     B. yourself     C. himself     D. themselves  

Active vacations are often the most relaxing of all. But Wait! It's all in defining what an active vacation is. We don't expect you to take up jogging, backpacking, or hang gliding. we ask the sedentary（爱坐的）vacationers to spend two to four hours a day doing things, such as walking the city streets, exploring a nature preserve, or taking a leisurely rowboat ride.

These kinds of activities aren't just good for your physical health. They improve your mental health, even your spiritual health. And they make vacations memorable and worthwhile. Here are some fresh ideas for active and healthy vacation.

Make the morning your activity time. At that time it is most likely that the weather will be friendlier, your energy level higher, and your schedule emptier than later in the day.

Have a walk at dawn or dusk. Such activity is called rejuvenation（恢复活力）. Try to make this a daily routine of life away from home, and you will guarantee yourself both physical and spiritual youth.

Get into the water as much as you can. Don't allow yourself to spend your entire time sitting in front of the water. Whether it is the ocean, a swimming pool, or a tree-lined lake, make sure you get into the water for swimming or games or even walking. Merely standing in waist-high water is a good workout, thanks to the action of the water. And you'll feel so much more alive!

Choose a cruise for your trip. It's amazing how active you can be being stuck on a boat in the middle of the Atlantic. Most cruise ships offer numerous options for seaworthy exercise. During your sea and land trips you can burn calories as you swim, hike, dive, and horseback ride.

Get out of the car every two hours. Many of us spend a large part of our vacations on the road, either getting to and from our destinations, or using the car for sightseeing. But no matter how beautiful the scenery is, great and memorable vacations don't happen in a car seat. Don't wait for tiredness or nature's call to get you to pull over. Frequently get out and stretch, walk, picnic, shop, visit, and have fun. It's important for your health and energy, and it makes traveling a lot more active and interesting.

The first paragraph mainly tells us ____________.

       A．that active vacations are very relaxing

       B．the activities we should join in

       C．how many hours we should exercise every day

       D．what an active vacations is

How many tips does the writer give in the passage?

       A．Three       B．Four  C．Five  D．Six

Which of the following is WRONG according to the passage?

       A．Usually the weather in the morning is better.

       B．You can have a memorable vacation in a car.

       C．Swimming can make you feel much more alive.

       D．Don’t drive your car very often to go sightseeing.

Which of the following is probably the best title for this passage?

       A．Driving Tips           B．How to Relax Without cars

       C．Give up Your Car and Walk    D．Make your Vacation Healthy

On June 5, 1981 the Centers for Disease Control in Atlanta, U.S. announced the presence of a rare, infectious disease in five American homosexuals(同性恋). Soon doctors were finding similar cases all over the country and the world. The AIDS epidemic(流行病)had officially begun. By 1983 it was clear that AIDS had spread around the world. More than twenty years later, AIDS has left twenty-six million dead and another forty million infected.  AIDS has become the worst medical disaster ever experienced by mankind.

Hundreds of young people between the ages of 20 and 45 died each week during the early years of the U.S. AIDS. More than 600,000 cases of AIDS have been reported since 1981 in the United States, and it is estimated that there may be as many as 900,000 Americans infected with HIV.

Though the rate of HIV infections continues to increase in the United States, the number of AIDS cases has fallen sharply since 1996, when antiretroviral drugs came onto the market. Unfortunately, the AIDS epidemic continues today in Africa and much of Asia, where antiretroviral treatment is not available and health care is far from enough. AIDS is the fourth leading cause of death worldwide, and the No. 1 cause of death due to infectious disease.

HIV, the virus that causes AIDS, was first separated in 1983 by a team at the Pasteur Institute in Paris. That discovery made it possible to develop a test for AIDS and trace back to victims who may have died before doctors were aware of the disease.

However, scientists still don't know exactly how and where AIDS started. Finding the source of AIDS could be important in developing a vaccine(疫苗) and be important in mapping the future course of the epidemic.

It can be inferred from the passage that       

     A．antiretroviral drugs will be obtained easily all over the world

     B．the best way to stop AIDS is to develop a vaccine

     B．scientists will soon find a way to cure AIDS

     D．there will be fewer AIDS cases in the world in the future

Which areas are the most worrying places where AIDS spreads quickly? 

     A．Africa.               B．Asia.             C．The United States.               D．France.

The number of AIDS cases has greatly decreased in the United States due to the fact

     A．a team at the Pasteur Institute in Paris succeeded in separating HIV

     B．some effective medicine has been invented

     B．scientists understand AIDS better and better.

     D．The rate of HIV infections continue to rise in the United States

What's the importance of the discovery of the source of AIDS?

    A．It can be used to develop a test for AIDS.

     B．It can stop HIV forming AIDS.

     B．It can reduce the rate of death caused by AIDS.

     D．It can help develop a drug to prevent AIDS.

What _____ pity that you couldn’t go there to receive ______ prize!

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

Winter depression (or winter blues) is a common affliction (折磨) for those who live in our northern climate. Its clinical name is seasonal affective disorder (or SAD) and up to 5% of the population (especially in northern states) may suffer from it. Seasonal affective disorder is characterized by feelings of sadness and depression that occur in the winter months when the temperatures drop and the days grow short . The depression is often associated with excessive eating or sleeping and weight gain. Women are twice to three times more likely to suffer from the winter blues than men.

    There are many effective treatments for winter depression, some of which you can do to help yourself. Increasing your daily exposure to as much natural light as possible can be helpful to many. Any time that you have the opportunity to gain access to more sunlight in the winter months, you should try to do so. Taking walks throughout the day (even if you don’t normally do so), sitting next to a south-facing window at your office, in a classroom, or at home will increase your sunlight exposure. Exercising next to a window or outdoors (when possible) is another activity that can help.

    Although it may be difficult to do, maintaining your schedule and lifestyle will help to keep the depression at bay. A regular pattern of sleep is the most important thing to maintain. It may be helpful, for instance, to have your bedroom lights on a timer to turn on a half-hour before you wake. This may help in waking at a regular time every morning, when it is still dark outside in the winter months.

    Light therapy has shown to be an effective treatment for seasonal affective disorder. While you can purchase expensive, specialized light therapy lighting fixtures for your home or office, some inexpensive alternatives are also available. Another lighting technique to try is to replace commonly used light bulbs in your home with brighter full spectrum (also known as broad spectrum) light bulbs. While more expensive than regular light bulbs, these bulbs provide light that is similar to natural sunlight.

    If none of these techniques seem to help your depressive symptoms, you should consider consulting your family physician or a mental health professional. The winter blues are a form of depression and can be readily treated w ith medications or psychotherapy when other self-help methods aren’t effective. Don’t be afraid to talk about this condition with a professional; it’s nothing to be ashamed or afraid of. With a little effort, the winter blues can be beaten

What do we know about winter depression?

A. It is very common where the weather is cold.

B. It may lead to weight gain.

C. It occurs when the temperatures drop.

D. It seldom affects men.

What is the most important factor in the therapy introduced in the second paragraph?

A. Exposure to natural light.

B. Sports in winter months.

C. Outdoor activities.

D. Sunlight through the window.

What does “to keep the depression at bay” mean in the third paragraph?

A. To shorten the duration of the depression.

B. To use light to resist the depression.

C. To keep the depression manageable and minimal.

D. To delay the occurrence of the depression.

For winter depression, light therapy ___________.

A. is much more effective than other kinds of therapy

B. is so expensive that some may not be able to afford it

C. encourages people to do outdoor exercises

D. needs specialized bulbs to replace ordinary ones

We can infer from the passage that __________.

A. self-help methods do not work 100% of the time

B. medications or psychotherapy is much more effective

C. mental health professionals don’t recommend self- help methods

D. most people prefer self-help methods to medications

Seeing her father, the little girl ran to him, her schoolbag_________________behind her.

A. flying               B. flew                  C. to fly                D. was flying?

—When did you meet her last?

 —I don’t remember exactly, but I’m sure it was ______Friday when I went to the shop to buy _______football.

 a; a B. 不填；a C. the；不填 D. 不填；不填

So far this year we ______ a fall in house prices by between 5 and 10 percent.

   A. saw             B. see            C. had seen             D. have seen