There is no denying that...Only in this way,can we..情况,which is becoming more and more serious.First of all/Above all,what's more,The last but not the least.第一第二第三.前面几个是高级句式...不能否认。。。不用太多难句式,
作文也就12句,用3-4巨难的就行了,注意用高级词汇,别good,very还高三写注意条理清晰,第一第二第三一定写,长短句穿插写就行了。