Fill each blank with a suitable preposition. Giải thích rõ vì sao lại viết như thế

Giải thích rõ vì sao lại viết như thế
Fill each blank with a suitable preposition
1. She was able to carry _________ all the tasks assigned to her.
2. The teacher explained the competition's rules _________ the students very carefully.
3. Most students are interested _________ the annual English-Speaking Contests.
4. He warned us _________ pickpockets.
5. In his speech, he thanked everyone _________ all their hard work.
6. Do you like taking part _________ competitions?
7. _______ the end of the competition, the judges will announce the total score of each group.
8. They quickly read the questions and tried to find _________ the answers.
9. Art competition is an opportunity _________ your creative activities.
10. The competition was about telling stories _________ English.