英译汉\汉译英 是高中英语 大哥大姐帮我翻翻 !

英译汉汉译英 是高中英语 大哥大姐帮我翻翻 !
1.once you get a feel for you classes,determine a goal for each one.
2.他自言自语的说道：“我应该帮助她摆脱烦恼/”
3.对***是必须的
4.much of the profit of a business-sometimes the whole of its success-depends on the use of the odds and ends.the oddsand ends(下脚料）are various small things.they are left over when the main thing is produced. yet they have a real value of their own.