1.Forests were very important for early Russians, 3. weren't they?
Yes, they were.
2.In Britain the Romans buit roads and towns, 6.didn't they?
Yes, they did.
3.London port was very important for the Romans, 4.wasn't it?
Yes, it was.
4.Fred always comes to classes in time, 1.doesn't he?
Yes, he does.
5.The new film about planets is very interesting, 2. isnt it? (тут в оригинале один film или films?)
Yes, it is.
6.Jane will be on holiday in July, 5.won't she?
Yes, she will.