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精英家教網 > 初中英語 > 題目詳情

They have made so great progress      


  1. A.
    three years ago
  2. B.
    for three years
  3. C.
    in the past three years
  4. D.
    before three years
C
考查時態(tài)!癷n/over/for+一段時間”常和現在完成時連用。A用于一般過去時。句意“在過去的三年里,他們已經取得了如此大的進步。”故選C。
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科目:初中英語 來源:2011年廣西梧州市中考英語試卷(解析版) 題型:閱讀理解

You are probably familiar with the saying:An apple a day keeps the doctor away. A recent research carried out by the Chinese University of Hong Kong may change the saying:
An apple a day may keep aging away.
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It turned out that those fruit flies that were given apple extract lived about 55 days—five days longer than the flies that were normally fed. The research group also found it easier for the flies to walk,climb and move about as they aged.
According to the result, the researchers believed that the antioxidants(抗氧化劑) in the apple extract helped clean up dangerous chemicals(化學物質) that cause illnesses,as well as aging.
In another study,researchers examined diets of thousands of women. They discovered that those who regularly ate apples were 20 percent less likely to suffer heart illnesses and stroke.
The apples’ genetic code(遺傳密碼) was discovered recently. It allows scientists to develop nicer and healthier fruits. Researchers are already using the information to grow a kind of apples full of antioxidants that can keep eyes and joints healthy and protect humans against heart illnesses and cancer.
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The team that keeps studying apple DNA includes 100 scientists from five countries. Their research also suggests that around 65 million years ago, when dinosaurs began to die off the plant,which would finally become today’s apple tree, experienced a great genetic change. The number of many of its genes doubled. The extra genes allowed the apple to get used to worse conditions and go through a different development from peaches,strawberries and other related fruits.
【小題1】Why were fruit flies used for the research?

A.Because they have a similar diet to humans.
B.Because they have a history as long as apples.
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A.Apples produce chemicals that can change human genes.
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C.Apples are rich in vitamins that are needed in humans’bodies.
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C.They experienced a great genetic change making them used to worse conditions.
D.They went through a similar development to peaches, strawberries and other related fruits.
【小題4】What can we infer(推斷)from the passage?
A.Eating apples may bring us more advantages than we might believe before.
B.People who have the habit of eating apples don’t need to see a doctor.
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