'Has' is the right answer as 'anyone' is singular and 'of you' is the prepositional phrase which is not part of the subject and so it is not to be taken into consideration while choosing the verb. Therefore, we say- Has anyone of you done the work? OR Anyone of you has done the work.
It would be better to say 'Sometimes things can't get any fresher'
The second one is more correct.
"That was wrong" is a grammatically correct sentence.
Yes, Almighty God is grammatically correct.
Yes, it is grammatically correct.
I am, you are, he/she/it is, we are, they are.
The phrase "how don't I" is not grammatically correct. A more correct way to phrase it would be "why don't I."
The correct phrase is "I can't wait any longer." Using "no more" in this context is not grammatically correct.
The grammatically correct version is Do you feel any aches in any places in your body?
It would be better to say 'Sometimes things can't get any fresher'
No.
No, "most friendly" is not grammatically correct. The correct form would be "friendliest" when comparing three or more things.
I would have to say no. I believe it would be "Do you have a pen" or "Do you have any pens".
Yes
The second one is more correct.
Yes, "is much more easily" is grammatically correct because it follows the correct order of adverbs (much, more, easily) when comparing multiple items or degrees in a sentence.
Yes, the phrase 'what they're doing' is grammatically correct. For example: What they're doing is wrong.