根据句意及首字母提示补全单词。

1. When I found him, he was cutting his hair in a b         shop.

2. No one knew what h         before they came to the museum.

3. While she was in the kitchen, she heard someone s         for help.

4. They were talking to some police o         in the park at that time.

5. Some children were s         when they saw the terrible animal.

成本预算中，适合于那些经营管理水平较高、业务结构和业务数量较为稳定的物业服务企业采用的预算是（）。

A.固定预算

B.弹性预算

C.零基预算

D.滚动预算