17. He takes part in all of his school activities. His health is poor. → In spite ........................................................................................................ 18. They will send an ambulance to the school in 10 minutes. → An ambulance ............................................................................................. 19. I have never met this strange man before. → This is the first time ...................................................................................... 20. “Don’t make too much noise, children” he said. → He told ......................................................................................................... 21. “Let’s help the homeless in the neighborhood.” Maria said → Maria suggested........................................................................................... 22. I last talked to him five months ago. → I haven’t ...................................................................................................... 23. Nowadays young people pay more attention to traditional festivals than they did some years ago. → Some years back young............................................................................... 24. This is the first time they have experienced the wonderful feeling in space. → They have never .......................................................................................... 25. We should teach young children to care for the environment → I suggest young children .............................................................................. giải thích đầy đủ theo câu ko nói lèo nhèo