问题 选择题
I ________ myself more—it was a perfect day.                       
A.shouldn’t have enjoyedB.needn’t have enjoyed
C.wouldn’t have enjoyedD.couldn’t have enjoyed
答案

D

解析 句意为:我那时玩得再高兴不过了——那真是完美的一天。couldn’t have done不可能做过。此处用not和比较级连用表达最高级的含义,意为“从未比这更高兴过”。故选D项。

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