The word “it” in paragraph 2 refers to_____.
Đáp án B
internal iron skeleton
Thông tin nằm ở đoạn 2: “By 1800 a complete internal iron skeleton for buildings had been developed in industrial architecture replacing traditional timber beams, but it generally remained concealed.”
=> it = internal iron skeleton
Silent reading, especially in public places, flourished mainly because of ___.
Paragraph 4 of the passage serves mainly to do which of the following?
It can be inferred that the emergence of the mass media and specialised reading materials was an indication of ___.
Why did the author wait until the last line to reveal the identity of the man in the photograph?
According to the passage, many people’s understanding of desertification is incorrect because _____.
The word “degradation” in paragraph 4 is closet in meaning to _____.
Large amounts of gases may be released from the Sun at the end of its life as a .