Computer is wide(widely) used in our every day(everyday) life.Many people,especially young people have (a) good knowledge of computer.Computer is more and more advance(advanced
) and nobody knows what computer will (be) like in one hundred years.
括号内是改动后的单词..
楼上所有人都没改动have (a) good knowledge of
所以都是错的.
have a good knowledge of 是固定搭配 一定要加a的...