The book three yuan but it only me two yuan.A. spends takeB. costs spendC. costs; cos

问题补充：

The book three yuan, but it only me two yuan.

A. spends, take

B. costs, spend

C. costs; cost

D. pays; cost

答案：

A. spends, take

B. costs, spend

(答案→)C. costs; cost

D. pays; cost

解析：物做主语，用cost；如用spend或 pay要用人做主语。