一、共享单车
Some people think bikes sharing are very useful and believe they will make our environment get protected. Others think it is not convenient enough to find a parking lot. As far as I can see, every one can use one by scanning the QR code(二维码) on the bike with a smartphone. What's more, we can take exercise by riding a bicycle.
二、一带一路
“One Belt” refers to the Silk Road Economic Belt(“丝绸之路经济带”). “One Road” refers to the 21st century Maritime Silk Road(“21世纪海上丝绸之路”).
Belt and Road Initiative(“一带一路”倡议)：The Belt and Road Initiative is a way for win-win cooperation that promotes common development and prosperity. The Initiative seeks mutual benefit.
Spirit of the Silk Road 丝路精神
三、文明出行
With more and more Chinese people traveling abroad, their bad behaviors have become a hot topic.There are plenty uncivilized phenomena in some tourist attractions. For example, Some tourists spit everywhere. First of all, keep your voice down while talking in public places. What's more, please wait in line if you are going to take a bus or go shopping. More importantly , never leave behind any rubbish in the tourist sites to keep the environment clean.
四、生日晚会 (道歉)
I am writing to express my apologies for not being able to take part in your birthday because I have to take the college entrance test. I know that you must be disappointed. I also feel worried and guilty in the depth of my heart for about the sudden decision.
Thank you for your kind invitation all the same. I will send you the birthday present that I carefully made, and I hope you like it. Maybe we can get together the other day. Happy birthday!