问题: I didn’t send outmy application form last week,but_____.
I didn’t send outmy application form last week,but_____.
A．had B．would C．should have D．might have to
解答:
答案：C．should have
这里用了省略。完整的结构应该是：should have done
表示“本来应该做到而实际上没有做到的”动作。
shouldn't have done 表示“本不该做而做了的”
eg. They didn't pass the exam. They should have study hard.
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