—What’s your favorite subject?

— English. I like it very much ________ it’s interesting and useful.

A．whenB．a(chǎn)fter

C．ifD．because

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Sixteen-years-olds shouldn’t ______to go to an Internet bar.

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I remember him once. But I can’t remember .

A．to see; how I met him

B．seeing; where I saw him

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There’s no pizza on Mars, but scientists have found a solution to this problem for hungry astronauts: a pizza printer! NASA, the American space agency, has developed a machine that “prints” food. They showed a model of the printer in Austin, Texas last month.

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In outer space, there are far fewer choices for astronauts for dinner. Most of their foods—even things like beef or shrimp—are eaten from bags as powders（粉末）. Scientists hope the new food printer can be used to make more delicious food in outer space, keeping astronauts healthier and happier.

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B．when it’s mixed with oil

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The policeman told her father _________ more carefully next time.

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閱讀短文，根據(jù)短文內(nèi)容回答問題。

On June 26th, 2000, two scientists, called Francis Collins and Craig Venter, told the world that they could now read the whole “map” of the human body: DNA. DNA is something that all humans have, and it tells the body what to do. DNA is the reason that we look like our mother and father, because we get some of their DNA to make our own. Now we can read some of this “map”, and so we can find out more about how our bodies work.

People have been trying to understand the human body for a long time. In 1860, Gregory Mendel discovered that there is a special reason why we look the same as other people in our family. It is because of small things called “genes” that we have in our body. In 1953, James Watson and Francis Crick made another discovery and found out that those small parts are really messages written in the DNA with a special language.

In 1961, Marshall Nirenberg and Johann Matthaei found the first “word” that they could understand in that language, showing how DNA tells the cell to build its parts. This meant that one day we would be able to read all the messages that a human body gets from its parents’ bodies. Scientists have now found all the words in DNA map, but we still do not understand what they all do. By understanding what just one “word” means, we can help save people from several diseases. So the more we understand, the more doctors will be able to do.

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2.Why do we look like our parents?

3.When was the first “word” of DNA discovered?

4.What can the doctors do if we understand some messages in DNA?

5.What does the writer tell us in the last paragraph?

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The lights in my room _______off when I left yesterday morning.

A．turnB．turned

C．a(chǎn)re turnedD．were turned

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Traveling is one of the most important activities and people have been interested in it for many years. Modern traffic develops fast, so traveling to different places has become much easier than before.

Staying healthy while traveling can make your trip happier. But do you know how to keep healthy during a trip? The following information may be useful for you.

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Wear comfortable shoes, a hat and sunglasses.

Take some necessary medicine with you. They can be used when you get sick or have other problems.

If you do lots of sports like walking or climbing on your trip, you should do some exercise for weeks or months before you leave.

While traveling:

Be sure not to eat dirty food or bad fruit.

Have enough time to take a rest during your trip.

Tap water(自來水) is not safe, so drink bottled water and always clean the cover on the bottle.

1.You should ______ before you leave your home for a trip.

A. get some medicine

B. clean the cover

C. drink much water

D. wear warm clothes

2.You had better not _______ while you are having a trip.

A. wear sunglasses

B. be too tired

C. wear a hat

D. take a rest

3.If you ________ while traveling, your trip will be happier.

A. walk fast

B. eat too much

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補(bǔ)全短文

Studies show that if you are 1.(interest) in something, your brain is more active and it’s also easier for you 2.(pay) attention to it for a long time. Good learners often connect what they need to learn 3. something interesting. For example, if they need to learn English and they like sports or music, they_ 4. (listen) to English songs or watch sports programs 5. English. This way they don’t get bored. Remember, “Use it or lose it”. Even if you learn something well, you will forget it unless you use it. “Practice 6.(make) perfect”. Good learners will keep 7. (practice) what they have learned, and they are not afraid of 8.(make) mistakes. Bell did not invent the telephone overnight. He succeeded by 9.(try) many times and learning from his 10..

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