Complete the sentences.Use For,since,all day 1)The boys are tried.They have been playing basketball....an hour and a

1) The boys are tried.They have been playing basketball for an hour and a half2) Alex has been talking on the phone since 5 o\'clock3) The telephone has been ringing all day4) Mr.Williams has been writing his book for half a year and he hasn\'t finished it yet5) People have been working on this problem since the beginning of the century6) John has been washing his car since 9 o\'clock this moning7) Sarah has been writing her project all day8) We have learning the poem for an hour and a half