Нужно употребить либо в present perfect, либо в present perfect continuous 15. your eyes are red. you (cry)? 16. where on earth you (be)? i (wait) for so long! 17. bill, you have got a black eye again. you (fight)? 18. do you think george (finish) the translation? he (write) for so long! 19. i think i can smell smoke on debbie's clothes. i'm sure she (smoke). 20. here you are! i (look for) you everywhere. where you (be)?