You that letter to James. However ，yo didn't（）.
A. ought to write
B.ought to have written
C.should write
D.should be writing
查看答案
正确答案： B 答案分析： 「句意」 你本应该给詹姆斯写信，然而，你没写。
「难点」 ought to have written 是虚拟语气，与本句句意相符。
包含此试题的试卷：
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