单选题 The book is borrowed from the library, so you ______ your children put dots and lines here and there.

【正确答案】 B

【答案解析】[解析] 本题测试特殊虚拟语气。should have done与ought to have done结构用法相同，表示应该做而没有做，否定形式为ought not to have done，表示不该发生的事却发生了，所以B选项是正确答案。