Most of the people know the importance of extensive research _______they fail to get accurate information at times.

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问题 Most of the people know the importance of extensive research _______they fail to get accurate information at times.

选项 A、so
B、either
C、besides
D、yet

答案D

解析 4个选项由连词和副词组成。这个时候就要赶紧看一下句子中共有几个S+V的结构?结果是两个。那么空格内当然应该填入连词。从词义上来看,在so和yet之间应该选择yet.作为参考,yet有和but一样连接平行成分的连词用法,也有和not yet(还没有)一样的副词用法。
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