问题补充：
单选题Hehasto_________20yuanonthebook.ButIneedn’t_______anymoneyforit.A.pay; spendB.cost; payC.spend; payD.take; spend
答案：
C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,
