that was a long time ago,wasn`t it?不懂后面那个wasn`t it,这是一种什么句式?为什么这么说?大神给讲解下,谢了

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 was sad that coffee___in Zfrica a long,long time ago.A discovered B inventedIt was sad that coffee___in Zfrica a long,long time ago.A discovered B invented C was invented D was discovered She was so sad that she was s___ for it for a long time. it was a long time before I though about that day again that was a long time ago,wasn't it?应该怎么回答, that was a long time ago 帮忙分析下句型~,是不是a long time 做表语,ago做time的宾补? It was quite a long time She was so sad that she was s____ for a long time.如题,一个空,如何添 从句语法题:填一个连词I was a long time ____ we had had a wonderful time together several years before.对 it was a long time不过不会是that吧 That road___too long time. For a long length of time many people in our country believed that the number 13 was bad luck.英译汉 it seemed that after what was a long time she began to wake up解释为何用what .He said__he had eaten nothing for a long time and__he was very hungryA that;/B /;thatC /;/D what,what it was because it raised many difficult quertions that the book took a long time to came out 英语13.After ______ seemed a long time ,he was able to raise himself.13.After ______ seemed a long time ,he was able to raise himself.a.it b.that c.what d.which 为什么 there was a farmer a long time ago 否定句 a long time ago,there was a queen.翻译 At that time I was a