One thing ____we should keep in mind is that every big thing

One thing ____we should keep in mind is that every big thing One...thing in my mind is... One thing certain,that is I shall do one thing in this life,One thing certain,that is: 英语翻译One thing is certain that life's always going to keep us one thing worth nothing is that... 英语翻译One thing that every dog needs to know how to do is sit. love is every thing every thing is chenging! .impossible for one .every thing in the world 选择A this is：to 英语翻译One caveat that the reader should keep in mind,when taki that is the in thing these days