Here are the suggested answers to fill in the blanks:

1. A. talents
2. B. team
3. A. gather
4. C. skills
5. D. attributes
6. A. mentors

So the completed passage would read:

"Debate clubs are valuable for developing students' communication and critical thinking **talents**. In these clubs, children learn to voice their opinions clearly and persuasively. The **team** in such a club is friendly and supportive, where students practice respect and consideration for opposing views. Members work in pairs or teams to **gather** ideas, craft arguments, and present their case. Participating in these clubs helps students learn how to **skills** evidence and counter opposing viewpoints. They develop essential **attributes** such as listening and analysis. Club mentors often serve as role **mentors** who guide students and provide valuable feedback."