There’s no way of knowing why one man makes an important discovery ______ another man, also intelligent, fails.

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问题 There’s no way of knowing why one man makes an important discovery ______ another man, also intelligent, fails.

选项 A、since
B、if
C、as
D、while

答案D

解析 考查连词。句意:很难理解为什么有人能做出重大发现,而有的人,虽然同样聪明,却一无所得。while在此表示对比。
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