You______that letter to James. However, you didn’t.

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问题 You______that letter to James. However, you didn’t.

选项 A、ought to write
B、ought to have written
C、should write
D、should be writing

答案B

解析由题干中的第二句可知这件事发生在过去，而“ought to+have+动词的过去分词”表示过去本应该做某事而实际上并未做，故答案为[B]。

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