Text-1 Read the text. Then choose the correct answer for questions 1-2

40. How did Charies Spearman experiment on his concept.
A) through assorted tests
B) through blood flow
C) through one part of the brain
D) through various subjects
41. According to the passage, some scientists suppose that...
A) environs don't play as great role as capacity.
B) surroundings effect, on the nature of intelligence
C) people can be intelligent only by learning.
D) human being is born with intelligence,
42. What is the main topic of the text?
A) Charles Spearman's concept
B) Researches on testing
C) The nature of intelligence
D) Human's brain and how it works