______ for your laziness, you could have finished the assignment by now.

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问题 ______ for your laziness, you could have finished the assignment by now.

选项 A、Had it not been
B、Weren’t it
C、It were not
D、Had not it been

答案A

解析题中逗号前为省略了if并部分倒装的虚拟条件句，表示与过去事实相反的假设。此处主句用could+完成时，条件句应为过去完成时态。

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GCT工程硕士（英语）

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