学校请来了麦格鲁夫警犬给孩子们讲解安全知识。

The school invited ___McGruff to teach kids about safety tips.

社区中心发放了麦格鲁夫宣传册，教孩子们如何防范陌生人。

The community center handed out ___McGruff brochures teaching kids how to stay safe from strangers.