下列句子均有一处错误，请在错处下划横线，并把正确答案写在题后的横线上（保持句子意思不变）。
1. There are four peoples in my family.________
2. Are those your friend?________
3. That is his father friend.________
4. This isn't her bag. It's I bag.________
5. -What are these?________
-These are apples.________