1)Are our students go to exhibition regularly?Our students go to exhibition regularly, aren't they?Who goes to exhibitions regularly? What do our students do regularly?Where our students are go regularly?2)Were their children playing computer games yesterday from 5 till 6 pm ?Their children were playing computer games yesterday from 5 till 6 pm, weren't they?Whose children were playing computer games yesterday from 5 till6 pm?What did their children do yesterday from 5 till 6 pm?What their children were playing yesterday from 5 till 6 pm?