请问That's a long long

请问That's a long long Not that long ago.请问这里的ago是什么意思?上句是：That was a long time ago. It's A Long It's a long than 's a long lt 's a long lt`s A Long 请问a long long ago是什么意思? It's a long lane that has no turning. a long answer ( ) that question that long? 请问It,s a long way这句是什么意? journey it's a long long journeyit's a long long journeytill i know where i'm supposed to beit's a long long journeyi don't know if i can believewhen shadows fall and block my eyesi am lost and know that i must hideit's a long long journeytill i find 请问He's been here for a long time和He's been here a long time的区别,还有 on that day和 that day的区别,别说哪个有错误,都是课本的. it's a long road It's been a long it's been a long It's one meter long.请问这里的 long 词性?