2. 外语
  3. ______for his timely help, I could not have climbed up to the top of the mountain.

______for his timely help, I could not have climbed up to the top of the mountain.

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问题 ______for his timely help, I could not have climbed up to the top of the mountain.
选项 A、If it was not
B、If it were not
C、Had it not been
D、Were it not
答案C
解析
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