题目内容：

i _____ have got up but the clock didn't work.A could B should

优质解答

i _____ have got up but the clock didn't work.A could B should选B【should have done】本来该做的事,事实上却没有做,是一种虚拟因为后句说【but the clock didn't work】说明我没有起来,所以用should...