It’s not easy me finish walking a 100-kilometer trail within 48 hours.A. of; toB. for; to

问题补充：

It’s not easy me finish walking a 100-kilometer trail within 48 hours.

A. of; to

B. for; to

C. of; for

D. for; for

答案：

A. of; to

(答案→)B. for; to

C. of; for

D. for; for

解析：句式It’s adj for sb to do sth .做某事对于某人来说怎么样。故选B。