A-A+
I ______ have written to him because he phoned
问题详情
I ______ have written to him because he phoned me shortly afterwards.
A．ought to
B．must
C．couldn"t
D．needn"t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：我本可以不给他写信的，因为他不多久就给我打电话了。Neednothavedone表示“其实本来不必……”，指过去已发生过的事，事实上没有必要。
