Although originally a German innovation, kindergarten got its real start in the United States as a movement to provide an improv

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问题 Although originally a German innovation, kindergarten got its real start in the United States as a movement to provide an improved learning environment for children.

选项 A、an easy
B、a playful
C、an open
D、a better

答案D

解析 improved:improve的过去分词,在句中起形容词的作用,即修饰learning environment,表示“改进了的;更好的”,与better意思相近。easy:容易的。playful:顽皮的;闹着玩的。 open:公开的;开着的。
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