用括号中所给词的适当形式填空。

1. ______ (teenage) want to go to the Watertown.

2. He got two ______ (Australia) stamps from his friend.

3. The Yellow River is the ______ (two) longest river in China.

4. Alice asks me ______ (polite) to put the things away.

5. The weather in Beijing is quite ______ (difference) from that in Guangzhou.