Pls can someone help me urgently

‘Arial’ / ‘Helvetica’?
( Quite hard to tell, from this tiny sample. )

Dav

or Chalet?
http://www.houseind.com/index.php?page=showfont&id=140&subpage=viewfonts

Tim
{edit: cancel that, the t is the wrong shape}

So small. Very hard to confirm. Could be one of the FF Schulbuchs.