Hello. I again need your grammar help and will be very grateful for it.

Please tell me if the sentences are OK:
"This is a very difficult situation,
1)the same as in Greece.
2)the same as it is in Greece.
3)the same as that in Greece.
4)the same as the one in Greece.
5)like in Greece.
6)like it is in Greece.
7)like that in Greece.
8)like the one in Greece.
I'll be very grateful for your help.

All of these are correct.

In very formal writing, though, numbers 5 - 9 are usually not used.

Hello! I'd be glad to help you with your grammar questions. Let's go through each sentence and analyze if they are correct:

1) "This is a very difficult situation, the same as in Greece."
This sentence is grammatically correct. It means that the situation being referred to is identical to the one in Greece.

2) "This is a very difficult situation, the same as it is in Greece."
This sentence is also grammatically correct. It emphasizes that the situation is the same as it is specifically in Greece.

3) "This is a very difficult situation, the same as that in Greece."
This sentence is grammatically correct as well. It uses "that" to refer back to the situation in Greece.

4) "This is a very difficult situation, the same as the one in Greece."
This sentence is also grammatically correct. It uses "the one" to refer back to the specific situation in Greece.

5) "This is a very difficult situation, like in Greece."
This sentence is grammatically correct. It means that the situation is similar to the situation in Greece, but not necessarily identical.

6) "This is a very difficult situation, like it is in Greece."
This sentence is also grammatically correct. It emphasizes that the situation is similar to how it is specifically in Greece.

7) "This is a very difficult situation, like that in Greece."
This sentence is grammatically correct. It uses "that" to refer back to the situation in Greece.

8) "This is a very difficult situation, like the one in Greece."
This sentence is also grammatically correct. It uses "the one" to refer back to the specific situation in Greece.

So, all the sentences you provided are grammatically correct. Now you can choose the option that best conveys your intended meaning. I hope this helps! Let me know if you have any further questions.