When can items of clothing be expensive​

1)i am doing a test now. - am i doing a test now? - what am i doing now? - when am i doing a test? - who is doing a test now? - am i doing a test or having lunch now? - i am going a test now, aren't i? 2) they are watching tv in the living room now. - are they watching tv in the living room now? - what are they watching in the living room now? - what are they doing now? - where are they watching tv? - when are they watching tv? - who is watching tv in the living room now? - are they watching tv or dancing in the living room now? - they are watching tv in the living room now, aren't they? 3) tom knows a lot of stories. - does tom know a lot of stories? - what does tom know? - how many stories does tom know? - who knows a lot of stories? - does tom know a lot of stories or poems? - tom knows a lot of stories, doesn't he? 4) we eat vegetables every day. - do we eat vegetables every day? - what do we eat every day? - how often do we eat vegetables? - what do we do every day? - who eats vegetables every day? - do we eat vegetables or fruit  every day? - we eat vegetables every day, don't we?