1)you can do that 2)we are obliged to study 3)the apartment is not very good 4)this room is not very big 5)go to the kitchen and take the two teapots 6)how it going? 7)how their business? 8)how are me doing 9)chairs behingd desks 10)today i have astronomy lesson 11)how many cars do you have? 12)how many apartments you? 13)kettles are on the table