_______ for your laziness,you could have finished the assignment by now.
正确答案: A
本题解析:
句意: 要不是你懒惰, 到现在你就能完成任务了。 本题是一个省略 if 的虚拟条件句, 主句用 could have done表示与过去事实相反,条件从句应用 had done形式, had 要提前构成倒装。
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