Choose the correct answer in brackets
1)These methods [A — are use /B — will be used /C – use] in production next year.
2)The experiments [A — have carryed out /B — were carryed out /C – carry out] yesterday.
3)The letter [A — is writing /B — wrote /C – is being written] now.
4)The paintings [A — will be exhibited /B — will have exhibited /C – will exhibit] till the end of the month.
5)I was sure students [A — had solved /B — had been solving /C – are solving] the task since 10 a.m..
6)I already [A — tell /B — have tell /C – have told] you the answer.
7)The tutor [A — will have been explaining /B — will explain /C – have explained] new rules for twenty minutes when he come to the University.
8)He says he [A — have worked /B — will have been working /C – will work] at the subject for two months by that moment