根据句意和所给汉语，完成句子。每空一词
【小题1】Listening to tapes every day is one of the greatest _________（秘诀）to learn English well．
【小题2】Be careful，or you’ll make some _________（错误），Daming．
【小题3】You should improve your reading _________（速度）to read quickly．
【小题4】These uncles are my father’s _________（同伴）．
【小题5】We all know _________（知识）is very important．
【小题6】The system has the _________（能力）to run more than one program at the same time．