Giúp mình với ạ, cảm ơn mọi người

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1. That tree was planted by her five years ago.
2. My father has the roses watered every day.
3. He's going to have someone redecorate his room with some new furniture.
4. I suggest using gas instead  of burning coal.
5. Because Tom was lazy, he failed the exam.
6. If we don't reduce the use of water and electricity, we'll have to pay more this month.