Taking this medicine if will of course do good to his health.A. continuedB. to continueC.

问题补充：

Taking this medicine，if，will of course do good to his health.

A. continued

B. to continue

C. continues

D. continuing

答案：

(答案→)A. continued

B. to continue

C. continues

D. continuing

解析：if continued 是“if taking this medicine is continued”的省略形式。