15. It is very nice .....of..........you to say so. (of/on/ at/ in)
16. Nam showed me how using a computer.
=> Nam showed me how to use the computer.
17. Time passes .....slowly......when you are alone. (slow)
18. Keep ....silent.......! the teacher is explaining the lesson. (silence)
19. I haven’t seen that man here before.
=> It’s the first time I have seen that man here.
20. How much time do you spend on ............your homework everyday. (do/doing/ to do/ did)
21. This building is ............than that one. (beautiful/ so beautiful/ more beautiful/ beautiful as)
22. They enjoy to listen to Michael Jackson’s songs.
=>They enjoy listening to Michael Jackson’s songs.
23. She always drives her car careful.
=> She always drives her car carefully.
24. This is the first time I have seen that film.
=> I haven’t seen that films before.
25. She rides her bike to school in thirty minutes every day.
=> It takes her thirty minutes to ride her bike to school every day.
26. I hate cooking and ..washing......clothes. (wash/ to wash/ washing/ washed)
27. Our school year now often starts .....in.....August the 15th. (in/on/at/ for)