It was a terrible accident. ( ), air travel is still the safest form of transport. ( 章节：5 难度：2)
- A、Nevertheless
- B、Hence
- C、Hitherto
- D、Although
正确答案:A
答案解析:有
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It was a terrible accident. ( ), air travel is still the safest form of transport. ( 章节：5 难度：2)
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