How did scientists discover the source of lead pollution in Greenland、

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• 1Lead accumulation worldwide decreased significantly after the use of unleaded gas in the US ________.

  A.was discouraged

  B.was enforced by law

  C.was prohibited by law

  D.was introduced

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• 2The study published in the journal Nature indicates that ________.

  A.the Clean Air Act has not produced the desired results

  B.lead deposits in arctic snow are on the increase

  C.lead will stay in soil and snow longer than expected

  D.the US is the major source of lead pollution in arctic snow

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• 3Why do some Japanese parents send their children to university-based kindergartens、

  A.They can do better in their future studies.

  B.They can accumulate more group experience there.

  C.They can be individually oriented when they grow up.

  D.They can have better chances of getting a first-rate education.

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• 4Free play has been introduced in some Japanese kindergartens in order to ________.

  A.broaden children’s horizon

  B.cultivate children’s creativity

  C.lighten children’s study load

  D.enrich children’s knowledge

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• 5In Japan’s preschool education, the focus is on ________.

  A.preparing children academically

  B.developing children’s artistic interests

  C.tapping children’s potential

  D.shaping children’s character

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• 6The authors of the Ambio study have found that ________.

  A.forests get rid of lead pollution faster than expected

  B.lead accumulations in forests are more difficult to deal with

  C.lead deposits are widely distributed in the forests of the US

  D.the upper layers of soil in forests are easily polluted by lead emissions

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• 7It can be inferred from the last paragraph that scientists ________.

  A.are puzzled by the mystery of forest pollution

  B.feel relieved by the use of unleaded gasoline

  C.still consider lead pollution a problem

  D.lack sufficient means to combat lead pollution

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• 8What is said about the average American in the passage、

  A.They tend to exaggerate the healthful effect of “light” beer.

  B.They usually ignore the effect of exercise on losing weight.

  C.They prefer “light” beer and low-calorie bread to other drinks and foo

  D.D.They know the factors that play a positive role in keeping down body weight.

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• 9Some people dislike exercise because ________.

  A.they think it is physically exhausting

  B.they find it hard to exercise while on a diet

  C.they don’t think it possible to walk 3 miles every day

  D.they find consulting caloric-expenditure charts troublesome

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• 10“Even exercise professionals concede half a point here” (Line 3, Par

  A.2) means “They ________”.A.agree that the calories in a small piece of pastry can be difficult to work off by exercise

  B.partially believe diet plays a supporting role in weight reduction

  C.are not fully convinced that dieting can help maintain one’s new weight

  D.are not sufficiently informed of the positive role of exercise in losing weight

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