(单选题)

When the boy lost his temper, he must ______ as his father told him.

A.break some plates and glasses

B.pull out one nail of the back of the fence

C.hammer a nail into the back of the fence

D.direct his anger towards problems

参考答案：C

参考解析：

细节理解题。根据文章第二句“His father gave him a bag of nails and told him that every time he lost his temper, he must hammer a nail into the back of the fence”可知，父亲告诉他每次他发脾气就往篱笆上钉一颗钉子。故选C。

知识点：