Урок 44. for/sincecomplete the sentences.use for or since. 1) the boys are tired. they have been playing football an hour and a half. 2) alex has been talking on the phone i came home. 3) the telephone has been ringing about a minute. why doesn't someone answer it? 4) mr williams has been writing his book half a year and hasn't finished it yet. 5) people have been working on this the beginning of the century. 6) john has been washing his car nine o'clock this morning. 7) sarah has been waiting for her sister a long time.
2)since
3)for
4)for
5)since
6)since
7)for