选C
for在句中作介词使用.
PREP
花费；以…的价钱
If something is bought, sold, or done for a particular amount of money, that amount of money is its price.
例句
We got the bus back to Tange for 30 cents...
我们花了 30 美分坐公共汽车回到坦格.
The Martins sold their house for about 1.4 million pounds...
马丁夫妇把他们的房子卖了 140 万英镑.
The doctor was prepared to do the operation for a large sum.
医生做这个手术需要收取高额费用.