Don’t give up regardless of difficulty and failure you’ll never achieve your goals.A. and

问题补充：

Don’t give up regardless of difficulty and failure, you’ll never achieve your goals.

A. and

B. but

C. or

D. so

答案：

A. and

B. but

(答案→)C. or

D. so

解析：考查祈使句+and（然后）/or/otherwise（否则）+陈述句，注意后面的陈述句通常是一般将来时。根据句意:不管困难和失败，别放弃，否则你就不能实现你的目标。可判断答案为C。