the instructions on the packet when you take the drug and the drug I think will work soo

问题补充：

the instructions on the packet when you take the drug and the drug, I think, will work soon.

A. Follow

B. To follow

C. Following

D. Followed

答案：

(答案→)A. Follow

B. To follow

C. Following

D. Followed

解析：祈使句+and 后用一般将来时态。中间有一个时间状语从句。句意：当你吃药的时候遵循包装上的说明书，我认为，药物很快会生效的。