(2013·新课标Ⅰ，32)There"s no way of knowing why one man makes an important discovery
题型：不详难度：来源：
| (2013·新课标Ⅰ，32)There"s no way of knowing why one man makes an important discovery________another man，also intelligent，fails. |
答案
| D |
解析
| 并列连词。根据句意，前后两句话为两种情况的对比“一个人会做出一个重要的发现，而另一个人，也很聪明，但是失败了”。并列连词while表示对比。故选D。 |
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