Question

改错It was a long time since we said good-bye to e

Answer 1

更正楼上答案如下：

改成：It is a long time since we said good-bye to each other.

解释：
这是一个固定句式：It is + 一段时间 + since从句，意思是“自从,,,以来多久了”。
还可以说成：It has been + 一段时间 + since从句。

如果要说成it was a long time也可以，但是其后的since从句时态必须改成过去完成时，即：since we had said good-bye to each other.

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Answer 2

It was (for) a long time since we said good-bye to each other.
加上括号之内的for，这样就变成了一个强调句。

希望能帮到你

Answer 3

It is a long time since we said good-bye to each other.

Answer 4

it is a long time since we said good-bye to each other