We were to go out for a camp it began to rain.
A. hardly; than
B. around; as
C. about; when
D. nearly; while
网友回答
A. hardly; than
B. around; as
(答案→)C. about; when
D. nearly; while
解析：考查固定句式。固定句式be about to do sth when…正要做某事在这时…(发生意料之外的事情)；句意：我们正要去野营，在这时天开始下雨了。根据句意说明C正确。