A few days before, a girl who studied abroad had the great honor to speech at the graduation ceremony. When people from her country was looking forward to hearing her wonderful speech, they were shocked by her exaggerate words. She said the air in her country was so bad that she needed to wear face mask every time she went out of the house. But when she stepped in America, she felt the sweet and fresh air. The fact is that the quality of air in her hometown was good, and there was no need to ...
