安全规则相关词汇与祈使句 — 英语填空题
题目
用所给动词的适当形式补全句子，使句意符合安全规则。每空一词（缩写算一词）：When you are at home alone, please (1)___ (not open) the door for strangers, and (2)___ (keep) away from the fire in the kitchen. Remember: (3)___ (not swim) in the river alone, or you may be in danger.