To keep safe is very important. When you are alone at home, you should ______ to prot...

To keep safe is very important. When you are alone at home, you should ______ to protect yourself.①have a list of phone numbers to call for help, such as 110,119 and 120②play computer games while boiling some water③keep the door locked④pay attention to the gas, water and electricity⑤let anybody in immediately when you hear the doorbell [ ] A. ①④⑤ B. ②③⑤ C. ①③④

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