Can someone help me. Thank you

Explanation:
1. The seashore is so beautiful at sunset. I've taken many photos.
2.Did anyone lose a backpack? I found a blue one in the lunchroom.
3.A butterfly landed on the flower. It was sipping the nectar.
4.I learned how to snorkel last summer. It was fun!
5.I can't believe I won first prize. This is the most exciting day of my life.
6.Do all bears hibernate? I want to find a book on bears of North America.
Answer:
1) The seashore is so beautiful at sunset. I've taken many photos.
2) Did anyone lost a backpack? I found a blue one in the lunchroom.
3) A butterfly landed on the flower. It was sipping the nectar.
or [i think]
-- A butterfly landed on the flower, it was sipping the nectar.
4) I learned how to snorkel last summer. It was so much fun.
5) I can't believe I won first prize! This is the most exciting day of my life!
6) Do all bears hibernate? I want to find a book on bears of North America.
Explanation:
Sorry if some of these are wrong, English isn't my first language but I tried anyway