Free 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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1 Why do some Japanese parents send their children to university-based kindergartens（　　）?

A．They can do better in their future studie

B．They can accumulate more group experience ther

C．They can be individually oriented when they grow u

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

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2 Questionsare based on the following passage.
Lead deposits, which accumulated in soil and snow during the 1960’s and 70’s, were primarily the result of leaded gasoline emissions originating in the United States. In the twenty years that the Clean Air Act has mandated unleaded gas use in the United States, the lead accumulation worldwide has decreased significantly.
A study published recently in the journal Nature shows that air-borne leaded gas emissions from the United States were the leading contributor to the high concentration of lead in the snow in Greenland. The new study is a result of the continued research led by Dr. Charles Boutron, an expert on the impact of heavy metals on the environment at the National Center for Scientific Research in France. A study by Dr. Boutron published in 1991 showed that lead levels in arctic （北极的） snow were declining.
In his new study, Dr. Boutron found the ratios of the different forms of lead in the leaded gasoline used in the United States were different from the ratios of European, Asian and Canadian gasolines and thus enabled scientists to differentiate （区分） the lead sources. The dominant lead ratio found in Greenland snow matched that found in gasoline from the United States.
In a study published in the journal Ambio, scientists found that lead levels in soil in the Northeastern United States had decreased markedly since the introduction of unleaded gasoline.
Many scientists had believed that the lead would stay in soil and snow for a longer period.
The authors of the Ambio study examined samples of the upper layers of soil taken from the same sites of 30 forest f

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3 Lead 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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Free play has been introduced in some Japanese kindergartens in order to（ ）.

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Free play has been introduced in some Japanese kindergartens in order to（　　）.