Theexperimentshowsthatproperamountsofexercise，if 

问题详情：

The experiment shows that proper amounts of exercise，if  __  regularly，can improve our health．（　　）

A．being carried out      B．carrying out

C．carried out   D．to carry out

【回答】

C

知识点：非谓语动词

题型：选择题