根据句意及首字母提示，补全单词。

1. People can buy what they need in the d            store.

2. Look at the sign: No P           !

3. We should ask for information in a polite way, or we will o           others.

4. Sometimes it is not good for us to ask the way in a too d             way in English-speaking countries.

5. Could you please tell me where the r            are, Sir?