Keep your minds to different ideas or you will not be successful.A. openingB. to openC.

问题补充：

Keep your minds to different ideas, or you will not be successful.

A. opening

B. to open

C. open

D. opened

答案：

A. opening

B. to open

(答案→)C. open

D. opened

解析：考查宾语补足语。形容词open做宾语补足语，对宾语进行补充说明。句意：让你的思维对不同的观点持开放的态度，，否则你不会成功。故C正确。