How many hours of sleep are the healthiest for most people？
At least eight hours.
B. Around seven hours.
C. As many as you need.
D. Less than seven hours.
查看答案
Which of the following activities is mostly close to parkour？
A. Jogging.
B. Obstacle race.
C. Gymnastics.
D. Acrobatic performance.
According to the passage," critical thinking skills" (Line 1, Para. 3) refers to skills of______.
A. judging and giving comments on something
B. decisive thinking
C. conquering crisis
D. finding out essentials
Which of the following statements can be inferred from the passage？
A. Women are more likely to die from inappropriate sleep.
B. Less sleep shortens the life span of both men and women.
C. Generally speaking, women need more sleep hours than men.
D. Longer sleep is more harmful to men.
What can we learn from the passage？
A. Participators believe long-term effective practice can help avoid injuries.
Beginners should train their endurance above all.
C. To parkour participators, speed is much more important than safety.
D. Large drops is the most difficult techniques of parkour.
微信支付 
支付宝支付