Trả lời: 17. My father is cooking dinner now, so he can't answer the phone.18. I don't think I'll go out this evening. I have an exam tomorrow.19. Look at those clouds of thick black smoke. They're going to pollute the air.20. Several clean-up activities are organised every...
Trả lời: 24. His father reminded him_______ off all household appliances when they are not in use.A. turning B. turn ...