At the top of the mountain to see the blue sky the kids made cheerful noises of all kinds

问题补充：

At the top of the mountain， to see the blue sky，the kids made cheerful noises of all kinds．

A. delighted

B. delighting

C. having delighted

D. delight

答案：

(答案→)A. delighted

B. delighting

C. having delighted

D. delight

解析：

试题分析:句意：在山顶上，高兴地看着蓝天，孩子们唧唧喳喳欢快地说笑着。delighted“感到高兴的”；delighting“令人高兴的”；delight“使某人高兴”，此处是形容孩子们的情况，故用-ed结尾的形容词，答案选A。