IV.
1. He was flooded with joy when his first child was born.
2. I think the introduction is unnecessary since you all know each other.
3. shortage
4. widely
5. better
V.
1. She said I had to be home by 9 o'clock.
2. She told me that John had left there an hour before.
3. He mentioned that he had been spending a lot more time with his children.
4. She told me that Jim was arriving at their house the next day.
5. Jim told us that we could stay in his house when he was on holiday.
6. Mary said she was sorry she couldn't come to visit me the previous summer.
7. He told me that he had grown those carrots himself.
8. If he doesn't make more efforts, he will lose his job.
9. Unless you stop working so hard, you will suffer from stress.
10. I won't come to Mike's party unless he invites me.
