I felt somewhat sad and was about to leave ________

试题详情及答案解析

I felt somewhat sad and was about to leave _________ something happened which drew my attention.

A．unless	B．until
C．when	D．while

答案：C

试题分析：考查连词辨析。句意：我正要离开，就在那时发生了一些事情，吸引了我的注意。Unless除非；until到……为止；when在那时；while然而。所以选C。
考点：考查连词辨析。