The little girl was jumping in the kindergarten waiting for her mother.A. upside downB.

问题补充：

The little girl was jumping in the kindergarten, waiting for her mother.

A. upside down

B. back and forth

C. back to forth

D. up and down

答案：

A. upside down

B. back and forth

C. back to forth

(答案→)D. up and down

解析：考查词组辨析：A. upside down颠倒，B. back and forth来回D. up and down上下，句意是：小女孩在幼儿园上上下下的跳，等着她的妈妈。选D。