题目内容：

根据句意，写出括号内所给单词的适当形式。

1.To get good grades in the exam, we should avoid___________(care).

2.The ________ the director is, the more scared the workers become. (anger)

3.Please cheer ______(you) up with songs and games during the journey, boys and girls!

4.You should never speak to the elderly ________ (polite).