问题补充:
— You don’t forget when we borrowed that reference book, do you?
— I can’t remember now but sometime last week?
A. might it be
B. could it be
C. could it have been
D. should it have been
答案:
A. might it be
B. could it be
(答案→)C. could it have been
D. should it have been
解析:考查情态动词。句意为“你想不起是什么时间借的那本参考书啦,对吗?我现在不记得啦,可能是上周的某个时间吧。”情态动词+完成时态表示对过去的推测.could表示可能性;should表示过去该做而没有做的事。表示可能性的用法是高考必考点之一。