You ______ that letter to James. However, you didn’t.A、ought to writeB、ought to

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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 语法结构题。本句的意思是:本句应该给詹姆斯写信,然而,你没写。本句的难点是:ought to have written是虚拟语气,与本句句意相符。
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