Directions: For this part, you are allowed 30 minutes to write a short essay based on the picture below. You should start your essay with a brief account of misbehaviors of Chinese tourists abroad and then explain what the causes of these uncivilized behaviors are. You should write at least 120 words but no more than 180 words.

A. More data are necessary to turn this possibility to be reality.
B. The possibility is just an intriguing possibility without data.
C. No amount of data cannot be a strong proof for the possibility.
D. More data are needed to turn it out to be a pure possibility.

A. It can make blood-brain barrier impermeable.
B. It can make blood-brain barrier less permeable.
C. It can make blood-brain barrier permeable.
D. It can make blood-brain barrier more permeable.