填spend.
1.在使用spend时,主语只能是表示人的名词或代词.例如: Andy spent a lot of money on books.Andy花了很多钱买书. 2.若表示"在.上花费(时间、金钱等)",常用句型spend some money/ some time on sth.,介词on后接名词或代词.例如: Kitty spends two hours on her homework every day.Kitty每天花两个小时做家庭作业. 3.若表示"花费(时间、金钱等)做某事",则常用句型spend some money / some time (in) doing sth.,此时第二个动词要用动词-ing形式,介词in可以省略.例如: They spent 4450 yuan buying the big colour TV set.他们买那台大彩电花了4450元.