问题补充:
(·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
答案:
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。