It is for many years ---we met last in lodon.是不是应该填that?

It is many years——we met last in London.填since
是的.意思是“自从我们上次在伦敦见面,已经过了许多年了”——我们已经多年不见了.
It is for many years ---we lived in lodon.是不是应该填that?
是的.这是个强调句型.应该用
It was for many years that we lived in London.
过去式.
去掉it was that
就是We lived in London for many years.
It is for many years ---we met last in lodon.这一句不对.
that不对,since也不对的.
因为不能说We met last in London for many years,所以不用that