Q1. Are all of the below sentences grammatical?
Q2. Which of these is your preference?
- I have some sad news to share: David will be leaving us at the end of the month.
- I have some sad news to share, David will be leaving us at the end of the month.
- I have some sad news to share, which is (that) David will be leaving us at the end of the month.
- I have some sad news to share. David will be leaving us at the end of the month.
- I have some sad news to share--David will be leaving us at the end of the month.