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单选题
68.what you intended, I would not have wasted my time trying to explain matters to you.
A
A. I had realized
B
B. Had I realized
C
C. Realized had I
D
D. Had realized I
答案解析
正确答案：B
解析：
68.【翻译】如果我（当时）知道你的意图，我就不会浪费时间试图向你解释这些事情了。【精析】B根据主句中的谓语动词would not have wasted可知，此处表示与过去事实相反的假设，所以if引导的非 真实条件句应用过去完成时，即谓语动词用“had+过去分词”的形式。另外，当if引导的非真实条件句中含有had, were或should时，可以把had, were或should提至主语之前，并省略if。故选B。
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