2. 外语
  3. I went there in 1984, and that was the only occasion when I _______ the journey in exactly two days.

I went there in 1984, and that was the only occasion when I _______ the journey in exactly two days.

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问题 I went there in 1984, and that was the only occasion when I _______ the journey in exactly two days.
选项 A、must make
B、must have made
C、was able to make
D、could make
答案C
解析 本句是陈述过去事实，而A项must多指现在或将来的情况，一般不用来表示过去必须做某事，据此排除。B项must have done sth．表示对过去行为的推测、猜想，不一定是事实，与句意不符。D项could指“一般的能力”，通常不表示某人在某一场合设法做了某事，故不正确。C项was able to专用于过去的具体场合，尤其指“具有能力完成某件有难度的事情”，因此正确。
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