Question

【题目】Scott’s aunt was about to turn off his mobile phone ______ it rang.

A. unless B. though

C. when D. since

Answer 1

【答案】C

【解析】

句意：史葛的姑姑正要关掉手机，此时电话铃响了。A. unless除非；B. though尽管；C. when当……时候，此时；D. since自从。be about to do sth.正要做某事，when引导的从句表示“正在此时发生了另一件事”，故答案为C。