Question

--- Why were you so late for work today？
--- ________ to the office was very slow this morning because of the traffic.

A． Driving

B．I drove

C．To drive

D．That I drove

Answer 1

A

试题分析：考查动名词做主语用法。本题中的动名词driving to the office做为句子的主语，动名词做主语指经常性，习惯性的行为。B项不能做主语；C项不定式做主语是指一次性的行为；D项是主语从句做主语，但是意思不句意不配。句意：—为什么你今天迟到了？—因为交通高峰期，所以驾车去办公室里很慢的。故A正确。
点评：动名词做主语表示经常性，习惯性的动作。如果是单个的动名词做主语，谓语动词用单数形式。