根据句意及首字母提示补全句子。

1. Sydney is the biggest ciry in A_______.

2. Animals are our friends. Please be f_______ to them.

3. They often go to the r_______ next to the park to have meals..

4. Do you know the girl w_______long black hair under the tree?

5. They are a_______ here next Monday, so we can meet them soon.