Id like to,but i cant -the time because im taking an exam to

选D
spend 的主语只能是人,不能使物.
句子结构是：人+ spend + 钱/ 时间 + on + 物.
He spent $ 300 on this bike.
He spent 3 hours on his homework.
或者,人+ spend + 钱/ 时间 + in + doing + 物.
He spent $ 300 in buying the bike.
He spent 3 hours in doing his homework.
cost主语只能是物,不能使人.意思是消费钱财.
The bike cost him $300.
afford意思是‘花得起或花不起金钱和时间’.
I can't afford the bike.
I can't afford to buy a bike.
pay 支付的意思.(自己分析下面句子的用法区别)
He paid $ 300.
He paid $ 300 for the bike.
He paid $300 to the seller for the bike.
take 的主语只能事物,不能使人.通常用it作主语.
It will take me 3 hours to do my homework.
It took me 30 minutes to walk from here to my school.