根据句意，在答题卡标有题号的横线上，写出括号内所给单词的适当形式。

1. Sometimes it requires courage to tell the __________(true).

2. This machine is ____________(special) designed for blind people.

3. Follow me, guys! Close your eyes, open your arms and ___________(breath) deeply.

4. What a terrible painting! This is probably the ________(ugly) painting I’ve ever seen.

去甲乌药碱为温里药的心血管活性成分之一，它具有β受体激动剂的广泛药理作用。