Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.

Câu hỏi

As time passed, men eventually discovered that substances such as coal and oil________.

A. are burning

B. would burn

C. have burnt

D. were burnt

Đáp án
B. would burn

Câu hỏi thuộc Bài tập:

Ôn thi vào lớp 10 _ đề số 4 (tập 2)