They ______ to escape from prison last month, and now the police are still tracking them down.
--- Where did you get to know her? --- It was on the farm _____ we worked.
Food safety is _______ important, so the government spares no effort to prevent food pollution.
When he woke up, he found his watch gone. It seemed that he suspected me ________ it.
We must _________ from old convention(传统)and adopt as many modern techniques as possible.
________ to the sunlight for too much time your skin will get burnt.