【题目】 From his expression, I don’t think he could have finished his homework last night, _______?
A. couldn’t he B. do I
C. did he D. hasn’t he
在线课程【答案】C
【解析】试题分析：C考察反义疑问句。句意：从他的表达中，我认为他昨天晚上不可能完成了作业，对吗？主句谓语是think, believe, expect, suppose, imagine等引导的宾语从句中，疑问部分与宾语从句相对应构成反意疑问句，故选C。