Mark the letter A, B, C, or D to indicate the underlined part that needs correction in each of the following questions.

Câu hỏi

When wood or coal is burnt, tiny pieces of black dust, called soot, is produced.

Đáp án
D. is produced

Câu hỏi thuộc Bài tập:

UNIT 5: GLOBAL WARMING - VOCABULARY - Tiếng Anh 11 Global Success