This kind of medicine in a dry and cool place。A. keepB. keptC. must keepD. must be kept

问题补充：

This kind of medicine in a dry and cool place。

A. keep

B. kept

C. must keep

D. must be kept

答案：

A. keep

B. kept

C. must keep

(答案→)D. must be kept

解析：句意：这种药必须保存在干燥凉爽的地方。结合语境可知本句主语是动作对象，故用被动语态，故选D。