() approach is a study of language from the points of view of its development in the course of time.

单项选择题How many people recognized the man in the pictures within 2 days().

A. 24.
B. 3.
C. 640.
D. 48.

单项选择题The author used the history of China and Iran in order to ().

A. criticize these countries
B. explain the effect of massive repression on opium production mid assumption
C. warn Afghanistan government
D. prove these countries are not "democratic\

单项选择题Why are publishers making their books freely available

单项选择题According to the passage, the earliest colonial ventures

单项选择题What method does the author mainly use in the passage to achieve better effects