题目内容

A driver should         __ the road when           .
A．concentrate on; drive B．concentrate in; driving
C．concentrate to; drove D．concentrate on; driving
Ｄ

试题分析：句意： 驾车的时候，司机应该集中精力在路上。“全神贯注于．．．．．．”是concentrate on，后面是一个省略了主语的时间状语从句。故选Ｄ。
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