This interesting book only me ten yuan and I ten month reading it.A. cost spendB. cost

问题补充：

This interesting book only me ten yuan and I ten month reading it.

A. cost, spend

B. cost, spent

C. spends, cost

D. spent, costs

答案：

A. cost, spend

(答案→)B. cost, spent

C. spends, cost

D. spent, costs

解析：spend主语通常为人表示花费的意思，故不选CD，本题表示的是过去用过去时态，cost的过去式是cost，spend的过去式是spent，故本题选B。