I assume your case has been DQ'd, but you have not received an interview letter. Below is how the process works: Your case will not be sent to the consulate until after NVC has scheduled your interview.
1. Case is DQ'd by NVC.
2. Case then enters NVC queue for your consulate and waits at NVC.
3. Consulate informs NVC of available interview date for upcoming month.
4. NVC schedules interviews for cases at the front of the line.
5. NVC schedules your interview when your case reaches the front of the queue for that consulate.
6. NVC notifies person of interview date via email.
7. NVC then sends case to consulate.
After the interview is scheduled, it can take several days to several weeks for the consulate to receive the case.
Generally, K-1 petitions are reviewed First in-first out. There might be some variances due to individual case background checks, etc. Of course, May priority dates would normally be reviewed prior to June priority dates.
18-24 months. The average, per other VJ members, is about 20 months from filing to interview. The best strategy is to ensure your forms are correct and fully supported. Good luck on your journey.
Put a "0" in them to avoid any confusion at NVC and the consulate.
Place a "1" in item #1 and in item #2.
Place a "0" in items # 3,4,5,6,7
Enter "2" "Household Size".
***Since the OP had originally posted in both the Adjustment of Status and the IR-1/CR-1 forums, I merged them into the only logical area at the time due to the mention of "visa denial". Now that the OP has clarified that this is an F4 case, I have moved it to the appropriate place***
The reading and writing portion does focus on civics and history. The written parts I can recall did.
The Naturalization Interview and Test | USCIS
"
Reading
You must read aloud one out of three sentences correctly to demonstrate an ability to read in English. The Reading Test Vocabulary List will help you study for the English reading portion of the naturalization test. The content focuses on civics and history topics.
Writing
You must write one out of three sentences correctly to demonstrate an ability to write in English. The Writing Test Vocabulary List will help you study for the English writing portion of the naturalization test. The content focuses on civics and history topics."