Điền so ( vì vậy ),but (nhưng ) , therefore ( vì vậy ) ,however( tuy nhiên ).

11. Prices have been rising. It is unlikely, ____however_____,that this increase will continue.

12. The bread was old and stale, __but___Martha ate it anyway.

13. The holiday had been a complete disaster. We, __therefore___decide to fly home early if we could.

14. He failed the exam, __therefore___ he had to do the job he didn't like.

15. They hoped to climb the mountain by August. ____but_____bad weather could be a hindrance.

16. This is the shortest way to the city center; _____but____ it is not the only way

17. The boy was able to learn English, __however___ he is very lazy.

18. He didn't attend the lesson, ___so__ he could not do his homework.

19. The rice is 6000 dong per kilo, ___so__ we bought 10 kilos.

20. Your son is heading to the right direction; ___therefore______, I think you should encourage him to learn harder.

21. It is very late now, _but____ she is still at her office.

22. It was midnight, __so___ they closed the restaurant and went home.

23. They visited many stores; _____but____, they could not find what they were looking for.

24. We discussed the issue all day, __but___ we could not come to a final conclusion.

25. It started to rain hard, __so___we decided to stay at home to watch TV.

26. The sun was warm, _____ a cool breeze blew in from the sea.

27. I have read this book before; ___but______, I do not remember the plot.

28. We opened the window, ___therefore___ fresh air would blow into the room.

29. The bus fare is expensive; _____therefore_____, I prefer to walk.

30. I wanted to study. ____but____, I was too tired.