What is the main idea of the article?A.Our internal clock mechanism doesn' t like rest, so
What is the main idea of the article?
A.Our internal clock mechanism doesn' t like rest, so keeping our routines is the key to good health.
B.We need longer holidays as we still feel tired after holidays.
C.There is a biological reason why people feel uncomfortable during holidays.
D.Holidays are part of our lives though we don' t actually enjoy them.