(单选题)

In view of his good manner in admitting mistake, mother finally decided to ( ) his off this time.

A.leave

B.let

C.put

D.set

参考答案：B

参考解析：

选项A：leave off停止；选项B：let off放出、宽恕；选项C：put off推迟；选项D：set off引起、动身。根据句意，鉴于他在承认错误时的良好态度，母亲最终决定饶恕他这一次，B项符合句意。故本题正确答案选B。

知识点：词汇辨析英语语法串讲通用英语