根据句意，用括号内所给单词的适当形式填空。

根据句意，用括号内所给单词的适当形式填空。
小题1:---How is your business going?
--- It couldn’t be _______ (bad).
小题2:Each of us _______ (breath) heavily after running on the playground every morning.
小题3:For everyone’s _______ (safe), we should always remember the law against driving after drinking.
小题4:Such a camera can help spacemen film _______ (they) during the flight.