With what topic is the passage primarily concerned?
Đáp án D
(A) Colonies of protozoans: các loại sinh vật đơn bào
(B) Mastigophora: Nhóm Mastigophora
(C) Motility in protozoans: tính chất của sinh vật đơn bào
(D) Characteristics of protozoans: đặc điểm của sinh vật đơn bào
Silent reading, especially in public places, flourished mainly because of ___.
Paragraph 4 of the passage serves mainly to do which of the following?
According to the passage, many people’s understanding of desertification is incorrect because _____.
It can be inferred that the emergence of the mass media and specialised reading materials was an indication of ___.
Large amounts of gases may be released from the Sun at the end of its life as a .
Why did the author wait until the last line to reveal the identity of the man in the photograph?