С. 15б 1. we couldn't go to the rock concert because all tickets out a) sold б) had been sold b)had sold c)have been sold 2. that's the prize i won at the competition yesterday a) that б) - b) which c) what 3. it began heavily while we were climbing up that mountain. a) to show б) to showing b) show c) showing 4. a: sue hasn't been to russia yet b: a)so have i б) nor have i b)i haven't either c) neither have i 5. luciano pavarotti nine years ago at the age of 72. a)passed by б)died b)passed away c)passed off 6. we don't need to worry. everything is control a)at б)on b)after c)under