Carelessness always contributes _______ car accidents. Therefore, drivers are advised to concentrate their attention _______ driving.

A. for; to B. to; on C. with; on D. in; to

 

B

【解析】

試題分析：考查介詞。第一個空是考查“contribute to”指“導(dǎo)致，有助于”；第二個空考查“concentrate one’s attention on”指“集中注意力于”。所以答案選B。

考點(diǎn)：考查介詞

 

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