(单选题)

It can be inferred that the gate of the baby farm was always kept locked in order to ______.

A.protect the children inside from dangers outside

B.prevent official visitors walking in unexpectedly

C.keep the children inside working all the time

D.ensure the children were always neat and clean

参考答案：B

参考解析：

推理判断题。根据最后一段可知，当有人来检查时都会提前通知，然后把孩子们洗干净。门常锁着是为了阻止官方访问者突然到来。故选B。

知识点：阅读理解四选一英语专业基础知识阅读理解教师招聘-小学英语