根据句意,用括号内所给单词的适当形式填空。
Don’t keep the secret to ________________ (you), boys. Sharing it with us is better.
The boy practices swimming a lot but he swims ______________ (badly) than his sister.
____________ (luck), Tom bought the last storybook in that bookshop yesterday evening.
The hat is one of the _______________ (climb). Please keep it for him.