2. 外语
  3. We could not have fulfilled the task in time if it _______ for their help.

We could not have fulfilled the task in time if it _______ for their help.

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问题 We could not have fulfilled the task in time if it _______ for their help.
选项 A、was not
B、is not
C、had not been
D、has not been
答案C
解析 该题考查的还是虚拟语气的用法，表示与过去事实相反的假设，句式结构为：If+主语+ had+过去分词，主语+should/would/could/might+have十过去分词。例如：If I hand’t run out of ink，I might have finished writing the paper。(要是还有墨水的话，我就能写完那篇论文了。)
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