单选题
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.
A、
an easy
B、
a playful
C、
an open
D、
a better
【正确答案】
D
【答案解析】
[解析] 画线词improved:改进的,更好的;better:更好的。故答案选D。
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