单项选择题

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
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单项选择题
She has proved that she can be relied on in a crisis.
A. lived on
B. depended on
C. lived off
D. believed in
单项选择题
John removed his overcoat.
A. took away
B. left aside
C. took off
D. washed off
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