单词填空:根据句意,用括号内所给词的适当形式填空。
Wang Dong always looks up to the brave _______________(hero).
It’s _________________(polite) for us to talk loudly in the library.
Tom’s parents stop him from _________________(swim) in the river.
Students should _____________________(not allow) to eat or sleep in class.
My grandpa often tells me some __________________(history) stories.