【题目】— Why do you look very upset?
— The electricity was cut off suddenly and my essay ________ unfinished since.
A. was leftB. has left
C. had been leftD. has been left
在线课程【答案】D
【解析】
考查时态语态。句意：——你为什么看起来很沮丧？——突然停电了，那时我的文章就没写完。句中leave与主语essay 构成动宾关系，要用被动形式；句中时间状语since表示从那时起到现在文章一直没写完，是现在完成时态的时间状语。故选D。