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)