Question

_______ good for our health. A．Do exercise is B．Doing exercise is C．Do exercises are D．

_______ good for our health. A．Do exercise is B．Doing exercise is C．Do exercises are D．Doing exercises are

Answer 1

B

试题分析：句意：做锻炼有利于我们的健康。do exercise做锻炼，exercise当锻炼时，是不可数名词，没有复数形式。be good for对……有好处；利于。此处作主语，故用动名词短语，动名词短语做主语，谓语用单数形式。故选B。