问题补充：
It me two hoursto the top of the mountain.
A. took; to climb
B. spent; climbing
C. cost; to climb
D. paid; climbing
答案：
(答案→)A. took; to climb
B. spent; climbing
C. cost; to climb
D. paid; climbing
解析：句意：爬到山顶花了我两个小时的时间。spend人作主语，宾语是时间和金钱，结构是人+spend+时间/金钱+on+名词，人+spend+时间/金钱+(in)V-ing;pay,付款人作主语，常用词组pay for;take 花费时间事物作主语，常用句式it+takes+sb+ ST+to do sth;cost,物作主语，只能花费金钱，故选A。
