根据句意及首字母提示完成单词。

1．W__________ is the post office? I can’t find it．

2．This hat is too big．Can you give me a s__________one．

3．The room in this hotel is very d__________．I want to change（换）a clean one．

4．Go d________ the street．and you will see the library on your left．

5．My mother works with people and money，so she works in a b___________．

6．It’s cold in winter and hot in s_________ in Beijing．

7．Tom is talking photos with his c__________ in the park．