(2012·昆明高二检测)It is well-known that proper amounts of exercises, if regularly, will benefit our health.
A. being carried out
B. carrying out
C. carried out
D. to carry out
网友回答
A. being carried out
B. carrying out
(答案→)C. carried out
D. to carry out
解析：C 句意：据说如果有规律地进行适量的运动，对健康有益。carry out是及物动词短语，与proper amounts of exercises之间是动宾关系，if条件句里省略了主语proper amounts of exercises，因此用过去分词表示被动。