根据句意用所给单词的适当形式填空。
Everyone should behave ____ in public. (polite)
--Who's that boy standing over there? --Sam, a foreign friend of____ . (I)
After working all night, Kate couldn't stay____ the next morning. (wake)
The UK is an old ____ country, where there are many palaces and castles. (Europe)
Nothing would prevent UNICEF, an international charity,____ the living standards of the children in poor areas. (raise)
