Giúp mình với ạ Mình cần gấp Cảm ơn

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1. I left my umbrella at home, which was a stupid thing to do .

2. He was well trained by famous inventors and went on to invent many useful machines .

3.  I was having to keep my eyes closed underwater when I swimming . 

4. The children whose mothers sat on the bench chatting played in the yard .