CРОЧНО!!!!!!!!Complete the sentences.Use for or since.1)The boys are tired.they have been

CРОЧНО!!!!!!!!
Complete the sentences.Use for or since.
1)The boys are tired.they have been playing football...an hour and half.2)Alex has been talking on the phone...I came home 3)The telephone has been ringing... about a minute.Why doesnt some one answer answer it?4)Mr Williams has been writing his book... half a year and hasnt fifnished it yet 5)People have been working on thus ... the beginning of the century 6)John has been washing his car ... nine oclock this morning 7)Sarah has been waiting for her sister ... a long time