安全规则表达：Don't... / Be careful — 英语选择题
题目
Tom 想提醒同学小心楼梯，以下哪句话的意思与 "Don't run down the stairs."（不要跑下楼梯）表达的安全提醒相同？A. Be careful on the stairs! Don't run! B. Run down the stairs, please! C. Don't be careful on the stairs! D. Let's play on the stairs!