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

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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 考查虚拟语气。句意:要是我过去几个月努力学习就好了。但是我没有足够努力,没有通过数学考试。if only表示一种虚拟,in the past few months是完成时的标志,所以用过去完成时,选D。
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