If only I______hard in the past few months! But I didn’ t work hard enough and f

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问题 If only I______hard in the past few months! But I didn’ t work hard enough and failed the maths examination.

选项 A、work
B、worked
C、have worked
D、had worked

答案 D

解析本题考查虚拟语气。if only位于句首，表示虚拟，引导与现在或过去事实相反的内容。该句描述的是与过去事实相反的内容，主句谓语使用过去完成时态。故选D。

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