阅读下面文章,回答有关小题,注意括号内的词数。

[1]A person searches various websites for different reasons, such as school, work, or entertainment. For teenagers, many informative resources on the Internet can be used. As a matter of fact, there are educational, music and art websites that are truly helpful to teenagers, because they can help ______________.

[2]Educational websites are helpful to teenager in doing school work and searching for a college. Some can help studying for tests, explaining a lesson, and doing homework. Some can help find the right schools based on one’s interests. And still others have pages devoted to the social life at each of the colleges or the specific activities that occur at a certain school.

[3]Some free music sites make it possible to meet teenagers’ musical tastes. On these sites, all types of music are available such as pop, rock, jazz, and country. One can type in a song, category or artist and his or her entire catalog appears. Then, the listener can make multiple playlists without creating an account with the site.

[4]There are various art websites that can help students to appreciate and create art pieces. On these sites, a student can view various photos and art pieces from different mediums or create an account with the website to upload their art pieces for people to see. In addition, one can enjoy various art projects that people have created on show for the rest of the world.

[5]Truly informative resources are offered on the Internet. The best suggestion one can receive is to try to look for new websites that can help in the educational, music or art area, so one can become learned and knowledgeable.

86.    What’s the main idea of the text?(no more than 10 words)

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87.    Fill in the blank in Paragraph 1 with proper words.(no more than 7 words)

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88.    According to the passage, what can you do if you want to listen to some music when visiting free music sites?(no more than 10 words)

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89.    What does the author want to tell us in Paragraph 4?(no more than 15 words)

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90.    Translate the underlined sentence in the last paragraph.

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One cause of the current food crisis is drought.Food prices are high in part because of dry weather in places as far distant as Spain and Australia.Around the world, the amount of land affected by drought has doubled in the past thirty years.And scientists concerned about climate change believe it will cause more drought in many areas in the future.

A lot of research is going into efforts to develop drought-resistant crops.One project involves tobacco plants genetically engineered to keep their leaves during water shortages.They chose tobacco because it has big leaves.Also, it grows fast and has structural similarities with some other plants.

The researchers did an experiment with two groups of tobacco plants.They worked with a set of normal plants and a set of transgenic plants.These had a gene added to interfere with the biological causes of leaf loss during drought.

The researchers put all the plants in a greenhouse to grow under normal conditions for forty days.Then, for fifteen days after that, the plants did not receive any water.

The normal plants lost their green color.Finally, they lost their leaves.But the researchers say the transgenic plants kept their leaves and their color.

After the fifteen dry days, all the plants were watered again for a week.The transgenic plants returned to normal growth, and their seed production was close to normal.But the other plants all died.

In addition, the researchers found that the plants could survive on only thirty percent of the normal amount of irrigation water.Yield loss was minor, they said.

The findings appeared late 2007 in the Proceedings of the National Academy of Sciences.The University of California has applied for patent protection for the technology.

The researchers expect to move forward with field testing of the transgenic tobacco in late August.They hope for similar results with crops like tomatoes, rice, wheat and cotton.

71.It can be inferred from Paragraph1 that _______

    A.the amount of land affected by drought has doubled in the past thirty years in the world

    B.drought is the only cause to lead to the current food crisis.

    C.food prices will be higher in the future with the drought areas extending

    D.food prices has nothing to do with the climate change in the world

72.One project chooses tobacco plants because __________

    A.planting tobacco can bring in great profits.

    B.tobacco plants have large leaves and structural similarities with some other plants

    C.tobacco plants grows fast

    D.Both B and C

73.From the beginning to the end, the experiment with two groups of tobacco plants lasts for at least _______ days

       A.40        B.55        C.62      D.77 

74.The conclusion they can draw in the experiment is that________

     A.the two groups of tobacco plants are the same drought-resistant crops.

     B.the transgenic plants can return to the normal tobacco plants

     C.the transgenic plants need more water than the normal ones

     D.the transgenic plants need less water and the decrease of production is small

 75.The next aim of the experiment is ______

     A.to apply for patent protection for the transgenic technology 

     B.to increase the production of the transgenic plants

     C.to hope for similar results with other crops .

     D.to move forward with field testing of the transgenic tobacco

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