我们吃晚饭的时候,一只鸟儿从窗户飞了进来.
Tea plants are (广泛地) grown in the south of China now.
Hold on to your (梦想), and one day it may come true.
When we left, the kids said goodbye to us (礼貌).
The stamp I bought yesterday (花费)me 20 yuan.
It's a good habit to brush your (牙齿) after a meal.