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单项选择题

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A.In day-care centres where little children were taken care of.
B.In areas in Chicago where poor people lived.
C.In places where hot lunch was provided for young people.
D.In schools where free classes were organized for young people.
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单项选择题A.18 American undergraduates.B.18 overseas undergraduates.C.18 American postgraduates.D.18 overseas postgraduates.

A.18 American undergraduates.
B.18 overseas undergraduates.
C.18 American postgraduates.
D.18 overseas postgraduates.

单项选择题A.The conversion of volcanic waste to fertilizer.B.The menace of currently dormant volcanoes around Mount Saint Helens.C.The eruption of Mount Saint Helens and its effects on the environment.D.The elimination of volcanic ash by natural means.

A.The conversion of volcanic waste to fertilizer.
B.The menace of currently dormant volcanoes around Mount Saint Helens.
C.The eruption of Mount Saint Helens and its effects on the environment.
D.The elimination of volcanic ash by natural means.