15. Before the principle... into the classroom, the teacher... the new grammar rule. a) came, had explained b) had come, had explaine c) come, had explained d) came, had been explained e) comes, has been explained 16. I... Nargiz only twice since she... the University. a) have seen, entered b) had seen, entered c) saw, had entered d) see, has entered e) have seen, has entered 17. He... before he was put in prison. a) has been tortured b) had been tortured c) will be tortured d) had torture e) would be torture 18. The teacher: "The play we are reading now...". a) is never performed b) never been performed c) has never been performed d) has been never performed e) had been never performed 19. If the employment agency had your address, you ... earlier. a) would inform b) will be informed c) had informed d) had been inform e) would have been informed 20. When you visit them next Friday they... that you are coming. a) have already heard b) would have heard c) will already heard d) will already have heard e) are already hearing​

Ответ:

16. I have seen Nargiz only twice since she entered the University. (e)

17. He had been tortured before he was put in prison. (b)

18. The teacher: "The play we are reading now has never been performed." (c)

19. If the employment agency had your address, you would have been informed earlier. (e)

20. When you visit them next Friday, they will already have heard that you are coming. (d)