fill in each blank one suitable word

Someone say you can do it in seven days, other promise sucess in 24 hours, or you may prefer to take your time and do it in 5 weeks. What are we talking about? Belive it_(1)_______not, these period (2)__________time refer to language learning courses that promise excellent results in less time (3)____________ it takes to say "Bonjour!". However, the advertisement of these companies are not necessarily (4)_______________best guide and if you don't know what to look for in a good course you could be left with litte (5)____________than a large bill. A complaint was recently made to a consumer rights group (6)____________WhizzLearn Systems, a language school chain, and the company has been forced to remove it claim that its technique is ten times better than any(7)___________method. The Managing Director of WhizzLearn Systems said :"(8)______________we still believe our claim is true, we are willing to change our advert. BUt the fact remains, if you spend 3 hours (9)___________day for 5 weeks on our language course you will soon be speaking the language. What we (10)_____________have done was to make (11)_______clearer in the advert. Then we woudln't (12)____________has these annoying complaints"