Whose backpack is this? A. Who is this backpack? B. Whose this backpack is? C. Who does this backpack belong to? D. Who is this backpack belong to?Đoạn văn33/42Whose backpack is this? Who is this backpack? Whose this backpack is? Who does this backpack belong to? Who is this backpack belong to?Giải thíchĐáp án đúng là C