15. If the sea level didn't rise, there wouldn't be floods in many parts of the world.
16. They are lazy students.
17. I suggest typing these letters first.
18. My sister plays tennis very badly.
19. He's a good teacher; however, I don't agree with his teaching methods.
20. Let's use energy-saving bulbs.
21. It took Jungkook an hour to go shopping at ben Thanh Market.
22. Kal is a good cook.
23. We play basketball well.
24. Because we have no food at home, we decided to go out for dinner.
25. I suggest that we shouldn't turn on the light when the room is bright enough.
26. Because of the wind, we couldn't go out last night.
27. If you take your raincoat with you, you won't be wet.