20. Do you feel like....(go) to the concert or would you like.....(stay) at home? 21. My family is considering....(take) a trip to the USA next year 22. The police didn't permit....(camp) in this wood for security reasons 23. We don't allow people....(smoke) in the lecture room 24. He's used to ....(go) on foot to work. -We get used to....(work) on Sundays 25. The teacher advised us....(review) the grammatical structures carefully 26.Sometimes student avoid...(look) at the teacher if they don't want...(answer) a question 27. You should try......(wear) any shirts you wants to buy 28. The teacher recommends us......(prepare) the lessons well before...(come) to class 29. There are people can't help...(laugh) when they see someone....(slip) on a banana skin