Question

【题目】I felt somewhat disappointed and was about to leave _________something occurred which attracted my attention.

A.unlessB.until

C.whenD.while

Answer 1

【答案】C

【解析】

试题考查连词辨析。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。