根据句意，在句子空白处填入适当的词，使句子完整。

1．As a student，they are ______ to obey the rules in schools．

2．Beijing is the __________________  of China．

3．What’s the ____________ with you，Tom?

4．Please give me a ____________ if you come back．

5．The government will provide homeless people ____________ some places to live.