It’s too bad that I failed in the math exam. If only I ______ hard at it!
A．workedB．had workedC．has workedD．would work
B

試題分析：考查虛擬語氣：if only表示“但愿…就好了”，后面的從句用虛擬語氣，謂語用相應(yīng)的過去時，和現(xiàn)在相反用過去時，和過去相反用過去完成時，和將來相反用過去將來時。這句話是指和過去相反，用過去完成時。句意是：我數(shù)學(xué)考試沒及格，真是太糟糕了。選B
點評：If only和I wish后面的從句都用虛擬語氣，形式也一樣，學(xué)生可以一起記憶，關(guān)鍵是動詞的形式，就是用相應(yīng)的過去時。
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