根据句意和汉语注释，写出单词的正确形式。
Boys and girls, do you know it’s a ____________custom to eat turkey at Thanksgiving？(传统)
Peng Liyuan, our first lady, is a great ____________, whose devotion to music is well-known. (音乐家)
The more the children are ____________, the greater progress they will make.(鼓励)
A ____________ survey shows that the sales of Taobao reached all-time high on Nov.11.(最新的)