问题补充：
He has to 20 yuan on the book. But I needn’t any money for it.
A. pay; spend
B. cost; pay
C. spend; pay
D. take; spend
答案：
A. pay; spend
B. cost; pay
(答案→)C. spend; pay
D. take; spend
解析：此题重点考查cost，spend，pay，take四个花费的区别；cost的主语是物常用句型结构是sth cost some money；spend的主语是人，常用的句型结构是sb spend some time/money in doing sth; pay的主语是人，常用句型结构是sb pay something some money；take的主语是it，常用句型结构是it takes sb some time to do sth,
