46.  That book belongs to Nam.    

-> That is __________Nam's book_________________

47.  It isn’t important for you to finish the work today.

-> You don’t _________have to finish the work today________________

48.  No one in our class is taller than Nam 

-> Nam is the _____________tallest person in our class__________

49.  Reading is more boring than watching TV

-> Watching TV is more __________insteresting than reading__________

50.  Do you have a cheaper computer than this?

-> Is this _____________the cheapest computer in there___________________?