朱丽芳：关于spend cost pay cost 用法的练习

樊刚的回答：

spend+doing/on+sth take+todo+sth cost+money+sth pay for

邹纪孟的回答：

spend+doing/on+sth take+todo+sth cost+money+sth pay for

善良的大灰狼的回答：

sb pay 钱for sth

sth cost sb 钱

sb spend 时间，钱(1)on sth

(2)doing sth