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{#blank#}1{#/blank#} (polite ) of Tom to push in before others in public.
We will be{#blank#}2{#/blank#} (punish) if we take no action to protect the environment.
Art exam is just like any other exam in{#blank#}3{#/blank#} (student) studies in that middle school.
The survey, carries out in that university, shows that three{#blank#}4{#/blank#} ( 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{#blank#}5{#/blank#} （proud) of us Chinese.
