1. you should work hard.
2. she went back home late last night.
3. we talked a lot that morning.
4. the meeting will last for two hours.
5. in the past ten years, my hometown has changed a lot.
6. it happens every day and everywhere in the world.
7. yesterday, it was on fire in his house.
8. it begins at eight o'clock.
9. the box weighs about five kilos.
10. i lived in beijing five years ago.
11. Alice can swim well.
12. john's father passed away last night.
13. birds flew to the south in Autumn.
14. my grandpa gets up early.
15. many students come to library to borrow books.