Why do some ethnic people build the communal house? => What
Question: Why do some ethnic people build the communal house?
=> What ______________________________?
Question: Why do some ethnic people build the communal house?
=> What ______________________________?
Đáp án: What do some ethnic people build the communal house for?
Giải thích: Why = What...for: vì sao
Dịch: Một số dân tộc xây dựng nhà rông để làm gì?