题目内容：

根据句意和汉语注释，在横线上，写出单词的正确形式。

1.Sam is too_____________ (不耐烦的) to look after his little sister.

2.When we face the difficulty, we need_____________(勇气).

3.The woman hasn’t decided _____________ (是否) to go abroad or not.

4.My teacher often advises us to read English _____________ (出声地) .