important to keep calm and give others appropriate personal space.可知，在公共交通上靠近其他乘客是不礼貌的。故选C。

Ⅱ.阅读七选五

(2019·兰州模拟)

How northern Europeans beat the winter blues

Ask a child from northern Europe to draw two pictures-one on a rainy day and a second in the sunshine-and this is what you will get: in the first，as raindrops fall from the top of the page，the man behind the window has an unhappy expression.When a yellow sun sends out some light from the corner，the man is smiling.

Northern Europeans associate rain with sadness and sunshine with happiness.They think this is true because they are so aware of how their environment affects them.__1__ In October 2008，a group of researchers examined the influence of different daily weather factors，including temperature，wind and sunlight，on 1,200 participants.The conclusion was that good or bad weather had little effect on people's feelings.__2__ A person who is upset on dark or cold days suffers from a negative mood，and he will be likely to experience a sad winter.This is the basis of an illness called Seasonal Affective Disorder(SAD)．__3__.

AniKalayjian，professor of psychology at Fordham University，advises that we should take steps to strengthen the brain's system against weather－driven mood changes.Research on SAD has been focused on the brain's response to darkness and light.When our eyes detect darkness，the brain gives off melatonin，which starts sleep cycles.__4__ It takes over to help us wake up and feel better when we detect light."We can encourage people to take charge of their feelings，" says Kalayjian."We tell them to leave the computers and the indoor games and get out there in the sun.__5__ "

A day of rain can potentially destroy your plan and affect your mood.But as the Scottish comedian Billy Connolly once said："There is no such thing as bad weather，only the wrong clothing."