As we know, ________is good exercise and it is necessary Wap版

试题详情及答案解析

As we know, ________is good exercise and it is necessary for health.

A．walk	B．to walk
C．walking	D．walked

答案：C

试题分析：句意：据我们所知，散步是很好的锻炼，对健康是必要的。此处做主语，故用动名词形式，故用walking。故选C。
考点：考查动名词的用法。