It relates to what kind of document you are going to write. It is very important to know appropriate tone of writing. Documents usually have a formal tone. This tone is used in reports, instructions and other business docs. You can't use slang, bad words etc in formal toned docs. Also your writing should to sound natural so don't make your docs stuffy.
Knight
Hope this helps! :3
1. study
2. is known
3. will still be
4. decide to buy
5. knew
6. would not have gotten
7. must choose
8. would never have occured
9. became
10. will be produced
11. will be
12. is
Answer:
what have you written so far