大象是什么样子的? an elephant ?
It is (有礼貌的) to knock at the door before entering a room.
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.