I heard a bus accident happened yesterday. —The bus crashed. Luckily, only a few passengers were _____ injured in the traffic accident.

— What do you think the noise was?— It ___________ a cat. [ ]

So absorbed _______ in her work that she didn’t realize it was time that she picked up her daughter.

man body consists of organs, each ____a definite job to do.

made a discovery, _________ of great importance to the progress of science and technology．