A-A+
We ______her letter last week. We don't know w
问题详情
We ______her letter last week. We don"t know what has happened to her.
A．must receive
B．must have received
C．ought to receive
D．ought to have received请帮忙给出正确答案和分析，谢谢！
参考答案
正确答案：D
解析：本题测试情态动词用法。ought．to have done意为“本应该做……”。本句大意为：我们本应上星期就收到她的信，不知道她出了什么事。
