Just, Yet, Already Error Exercise

These sentences use either 'just', 'yet' or 'already'. Are they correct or not?

1. I haven't been to the new shopping mall yet, but I want to go soon.
Correct
Not Correct

2. I've just been to Moscow, in 1998. I don't want to go again. Let's go to St. Petersburg!
Correct
Not Correct

3. Stop shouting at me! I've already done all my homework, now I want to watch some TV.
Correct
Not Correct

4. "Have you cleaned your teeth yet?" "Yes, mom, I did it while you were chatting on the phone."
Correct
Not Correct

5. Are you going on vacation again? Haven't you just got back from the Caribbean?
Correct
Not Correct

6. Cynthia has got already a smartphone. Let's get her something else.
Correct
Not Correct

7. "Can you phone your father? He's worried sick about you." "I just did."
Correct
Not Correct

8. "Already seen, already seen, already seen! I've seen all of these movies. Oh, this one, I haven't seen yet."
Correct
Not Correct