Hiking by oneself can be fun and good for health. It may also be good for building.A. res

问题补充：

Hiking by oneself can be fun and good for health. It may also be good for building.

A. respect

B. friendship

C. reputation

D. character

答案：

A. respect

B. friendship

C. reputation

(答案→)D. character

解析：根据常识便可知运动既可增强体质也可强健个性，不会增强尊敬或名声，友谊可以增强，但与前面health不搭配，故答案为character。