Cho các hidrocacbon sau: axetilen, metan, isopren, vinylaxetilen, butadien, metylaxetilen, toluen, stiren. Số chất vừa làm mất màu dung dịch Br₂ và dung dịch thuốc tím ở điều kiện thường là:

A. 7

B. 8

C. 5

D. 6

Mark the letter A, B, C or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions.

In spite of his poverty, he led a devoted life to the revolutionary cause

A. He could not devote his life to the revolutionary cause because of his poverty

B. If he had not been so poor, he could have devoted his life to the revolutionary cause

C. Poor as he was, he led a devoted life to the revolutionary cause

D. He led a devoted life to the revolutionary cause, but he was so poor