yes it is correct. No it isn't. Any time on Monday, or Any time next Monday, or Any time on the Monday coming would be correct. And remember, okay is a slang word.
The/This data is okay.
no. Well yeah it's okay to use a word twice.
☺ Okay, well of course, that is not correct. Shut yo stanks.
Technically, the correct usage is "were appreciated." However, it would be okay in this particular sentence to use "was appreciated."
It is okay to be embarrassed as that makes you to correct your mistakes.
Yes you can. Example: Okay, I will go with you.
It is okay to say either. Both are correct. Which one you should choose might depend on the whole sentence.
Yes, it is okay to do so. Usually, there is a comma after it. EX: Then, John entered through the door.
That depends on what you are saying/asking. If you say something like "Later today, where will you be at?" or "Which restuarant is the salad bar at?" then that is correct. Saying "At 5:00 I will be at." is incorrect. When saying something like this, it's an incomplete sentence. In this example, you need to state where you will be at. This would be the correct way to finish the sentence: "At 5:00 I will be at the Matthew's house."
okay
I am photofinishing this okay
Yes.