The central idea of this passage is _____.

A. man’s mental abilities change from season to season
B. man’s intelligence varies from place to place
C. man should take long vacation in summer
D. if you want to do creative thinking, go to a cool place
A. man’s mental abilities change from season to season
B. man’s intelligence varies from place to place
C. man should take long vacation in summer
D. if you want to do creative thinking, go to a cool place

【答案】