根据句意，用括号中所给单词的正确形式填空，每空一词。
It’s       (polite ) of Tom to push in before others in public.
We will be        (punish) if we take no action to protect the environment.
Art exam is just like any other exam in        (student) studies in that middle school.
The survey, carries out in that university, shows that three        ( five) of the teachers wear glasses.
The athlete Su Bingtian came third with a run of 9.99 seconds in the men’s 100-meter race. He has become the ______(proud) of us Chinese.