7、adj.确定的,肯定的It‘s certain thateveryeffectmusthaveacause.无疑,每个结果必定有其原因比sure的语气更重It‘s certain that比It‘s sure that更为普遍certain的主语是物,sure的主语是人7.(课本P2)Inthefuture,carefortheenvironmentwillbecomeveryimportantasearth’naturalresourcesrunout.Carefor照顾照料喜欢Idon‘t carefor thatcolor.我不喜欢那种