Questions 6 to 10 are based on the following passage.

题目

Questions 6 to 10 are based on the following passage.
　　Sleep plays a major role in preparing the body for an alert and productive tomorrow.But sleep is not a period of inactivity.The sleeping brain is highly active at various times during the night,performing numerous “house keeping tasks”.These keep us alive and aid our ability to think and remember.Sleep also energizes the body and brain.Most people spend one-third of their lives sleeping and this will affect the other two-thirds in terms of alertness,energy,moods,body weight,perception,memory,thinking,reaction time,productivity and performance.
　　To limit sleep means our health and daytime potential are significantly reduced
　　So,good sleep strategies are essential in order to feel energized day after day.There is no strategy which works for everyone,so each person needs to experiment.One important thing is that you shouldn’t worry too much if you go a few nights without a lot of sleep.It won’t ruin your life.On any giv

答案

B
B
B
B
C