自我开始学英语以来，我结识了很多外国朋友．
I have made many foreign friends I leaning English．
The teachers welcome their students （polite） at the school gate every morning．
After doing sports for months， Tina is becoming （thin） than before．
Forty （year） development has changed Huai'an into a modern city．
To my surprise， my uncle got his driving licence in his （fifty）．
Andrew often does DIY with different （knife） in his free time．