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
解析试题分析：考察固定搭配和状语从句的省略。固定搭配：Concentrate on注意力集中于….；第二空在when后面省略了he/she is。当状语从句的主语和主句主语一直的时候，可以把状语从句的主语以及be动词一起省略。句义：当司机在驾车的时候，他/她应该把注意力都集中在道路上。故D正确。
考点：考察固定搭配和状语从句的省略
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