根据句子的意思，补全单词。

1. The little boy often _       _ to sleep on the bus when he sees old men beside him.

2. The little girl has            up all her money so she has to walk home.

3. Because your brother is a            boy, his friends won't believe in him any more.

4. Can you _          the big stone without any help?

5. Some thieves             to escape from the police station, but they failed at last.

针对此类疫情，应该采取怎样的防护措施？