Rewrite the sentence without changing the meaning

----- Nội dung dịch tự động từ ảnh -----
X/Rewrite the sentence without changing the meaning
1. Keeping the environment clean is very important.
- It's
2. They will show the time machine to the public when they finish it.
- The time machine..........
3. He was delighted to receive his aunt's letter.
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- He was delighted that
...
4. Old car tires are recycled to make shoes and sandals.
- People......
5. I'm very sad that I wasn't accepted in that group.
- I'm very sad not
6. It's three years since I last spoke to her.
- I
haven't...........................................................................................
7. Tam doesn't type as fast as she used to.
-Tam used........................
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- It is Lan's...........................
10. How long is it since you used the pen?
- When
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8." Please turn down the radio for me", said my father.
- My father asked...........
9. Lan will be fifteen next week.
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