Question

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

Answer 1

B

试题分析：考查介词。第一个空是考查“contribute to”指“导致，有助于”；第二个空考查“concentrate one’s attention on”指“集中注意力于”。所以答案选B。