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 worse (bad).
【小题2】Each of us breathes (breath) heavily after running on the playground every morning.
【小题3】For everyone’s safety (safe), we should always remember the law against driving after drinking.
【小题4】Such a camera can help spacemen film themselves (they) during the flight.
网友回答
解析：【小题1】你的工作进展的怎么样？不能再坏了。worse更坏
【小题2】每天早上在操场上跑步之后，我们每个人都呼吸急促。breathes呼吸
【小题3】为了每个人的安全，我们应该牢记酒后驾驶是违反法律的。Safety，名词，安全
【小题4】这种相机能够帮助宇航员在飞船中拍摄他们自己。themselves他们自己