1) 1 a) Who class are you in? b) Whose class are you in? 2) 2 a) Do you know where is our room? b) Do you know where our room is? 3) 3 a) We're in Room 203. b) We're in the Room 203. 4) 4 a) It's on second floor. b) It's on the second floor. 5) 5 a) How long did you study in this school? b) How long have you studied in this school? 6) 6 a) I have studied here for a year. b) I have studied here since a year. 7) 7 a) I haven't met anybody yet. b) I haven't met anybody already. 8) 8 a) You would join the English conversation club. b) You could join the English conversation club. 9) 9 a) Do you have any idea when the group meets? b) Do you have any idea when does the group meet? 10) 10 a) I don't know. I would ask somebody at the information desk. b) I don't know. I should ask somebody at the information desk.

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