Fresh flowers actually continue to grow while in a vase．So in order to keep flowers fresh, you need to consider what the flowers need to grow and stay healthy．Flowers need water, light, and food．Besides, you need to be aware of a few precautions to take．

Distilled water（蒸馏水） is the best kind of water to use for fresh flowers, because there are no chemicals in it．Change the water for your fresh flowers every day or no less than every 2 days to prevent bacteria（细菌） building up．Cut the stems under water again before putting them back in the vase, so that they will be able to draw water up easily．

Keep your fresh flowers out of direct sunlight．At night, put them in the fridge．This will prolong their life．Adding commercial flower food to good water is probably the best method of keeping flowers fresh．Some people put sugar in the water for food．That is OK, but commercial flower food has bacteria-killing ingredients, which can make the water more acidic（酸性的）．If you want a more natural food for your fresh flowers, try water that has been specially treated．That solution will also give the water acidity, sugar, and bacteria-killing ability．

Keep your fresh flowers away from fruit．Fruit gas, or ethylene, will reduce the life of your fresh flowers, making them get older faster．Ethylene is what makes fruit ripen．It is given off by dead flowers, too, so be sure to remove them．

If you follow these tips, your fresh flowers will last a long time and beautify any room in which you put them．

1．What does the underlined word precautions in Paragraph 1 mean?

A．problems that happen to flowers． B．advantages of having flowers．

C．measures taken to prevent problems．   D．preparations to grow flowers outside．

2．The fact that distilled water is most beneficial for fresh flowers indicates that ______．

A．distilled water is perfect for people to drink

B．running water shouldn’t be used to water flowers

C．it takes great efforts to keep flowers fresh

D．fresh flowers aren’t used to certain chemicals

3．In order to prolong the life of fresh flowers, you should ______．

A．protect them from direct sunlight during the daytime

B．put them in a damp place at night

C．put them in a fridge all the time

D．put them near water during the daytime

4．Which of the following is the best method of keeping flowers fresh?

A．Cutting the stems under water before putting them back．

B．Using distilled water and commercial flower food．

C．Keeping them away from fruit gas．

D．Watering them with water which contains sugar．

Speech is ______ heard when it is given in a clear voice just slightly louder than normal.

　 A. hardly 　 B. less    C. completely　　　 D. best

Fresh flowers actually continue to grow while in a vase．So in order to keep flowers fresh, you need to consider what the flowers need to grow and stay healthy．Flowers need water, light, and food．Besides, you need to be aware of a few precautions to take．
Distilled water（蒸馏水） is the best kind of water to use for fresh flowers, because there are no chemicals in it．Change the water for your fresh flowers every day or no less than every 2 days to prevent bacteria（细菌） building up．Cut the stems under water again before putting them back in the vase, so that they will be able to draw water up easily．
Keep your fresh flowers out of direct sunlight．At night, put them in the fridge．This will prolong their life．Adding commercial flower food to good water is probably the best method of keeping flowers fresh．Some people put sugar in the water for food．That is OK, but commercial flower food has bacteria-killing ingredients, which can make the water more acidic（酸性的）．If you want a more natural food for your fresh flowers, try water that has been specially treated．That solution will also give the water acidity, sugar, and bacteria-killing ability．
Keep your fresh flowers away from fruit．Fruit gas, or ethylene, will reduce the life of your fresh flowers, making them get older faster．Ethylene is what makes fruit ripen．It is given off by dead flowers, too, so be sure to remove them．
If you follow these tips, your fresh flowers will last a long time and beautify any room in which you put them．
1．What does the underlined word precautions in Paragraph 1 mean?
A．problems that happen to flowers． B．advantages of having flowers．
C．measures taken to prevent problems．   D．preparations to grow flowers outside．
2．The fact that distilled water is most beneficial for fresh flowers indicates that ______．
A．distilled water is perfect for people to drink
B．running water shouldn’t be used to water flowers
C．it takes great efforts to keep flowers fresh
D．fresh flowers aren’t used to certain chemicals
3．In order to prolong the life of fresh flowers, you should ______．
A．protect them from direct sunlight during the daytime
B．put them in a damp place at night
C．put them in a fridge all the time
D．put them near water during the daytime
4．Which of the following is the best method of keeping flowers fresh?
A．Cutting the stems under water before putting them back．
B．Using distilled water and commercial flower food．
C．Keeping them away from fruit gas．
D．Watering them with water which contains sugar．

Doctors have known for a long time that extremely loud noises can cause hearing damage or loss. The noise can be the sound of a jet airplane or machines in factories of loud music or other common sound at home and at work. A person only needs to hear the noise for little more than one second to be affected.

An American scientist has found that using aspirin (阿斯匹林) increase the temporary (暂时的)hearing loss or damage from loud noise. He did an experiment using a number of students at a university who all had normal hearing. He gave them different amounts of aspirin for different periods of time, then he tested their hearing ability. He found that students who were given four grams of aspirin a day for two days suffered much greater temporary hearing loss than those who did not use aspirin. The hearing loss was about two times as great.

The scientist said millions of persons in the U.S. use much larger amounts of aspirin than were used in his experiment. He said these persons face a serious danger of suffering hearing loss from loud noise.

1.Doctors have long known that__________.

2.This passage suggests that one’s hearing________.

3.One conclusion you can draw from the passage is that aspirin________.

4.Millions of Americans are in danger of suffering hearing loss because they__________.

5.The American scientist did his experiment in order to find ________.

According to some researchers, you should not praise children for everything that they do. It does not help them build self-confidence.

     Most parents and teachers agree that praise can help increase children’s self-confidence —the more, the better. However, according to some researchers, only proper praise is good for children. If adults praise everything children do, it makes children look for praise all the time, not trying to do their best. "Teachers should not say things like 'good job’ or 'nice work’ whenever a child does anything. They should encourage them to continue to improve," some researchers advise.

     Another idea is that children with high self-confidence are happier, and do better at school. About this, Marshall Duke, a researcher in children, says, "High self-confidence brought in by too much praise does not make children happier, get more, or become able to do more. Finding a child’s advantages (强项) and developing them can help build confidence more than too much praise can." Praise also loses its effect (影响) if it is given equally to all students.

     "It’s important to tell children the truth about what they’ve done. Honest feedback (反馈) is far better than empty praise," Duke adds. "People have got into the habit of not telling children when they’re wrong. That makes it hard for them to deal with difficulties when they grow up. That’s just how the world is."

1.According to some researchers, if parents praise their children too much, their children will ______.

A. always look for praise

B. increase self-confidence

C. become strong

D. do better in their studies

2. In order to help children build self-confidence, some researchers advise parents to ______.

A. make them live more happily

B. let them do more difficult work

C. help them do better in school

D. encourage them to improve

3.Which of the following is TRUE, according to the passage?

A. Praise makes children become successful.

B. Children don’t know what they’re really good at.

C. The same praise for all children has no meaning.

D. Duke thinks praise is more important than finding children’s strengths.

4. What is the last paragraph about?

A. It’s important to have the habit of praising children.

B. Children should know their mistakes as soon as possible.

C. We should praise children honestly and tell them their mistakes.

D. What children with high self-confidence are like.