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Answer:
7. The last time they have seen Tony was on his 40th birthday.
8. The machine began being used by them in 2012.
9. They last fed their monkey two days ago.
10. My uncle has not drank alcohol ever since he got married.
7. The last time Tony was seen was on his 40th birthday.
8. This machine began being used by 2012.
8. They last fed their monkey two days ago.
9. My uncle has stopped drinking since he has been married.
8. This machine began being used by 2012.
8. They last fed their monkey two days ago.
9. My uncle has stopped drinking since he has been married.