四、托福写作25分必备的50个意群词汇
托福写作常用“十大句式”
1、It is for the benefit of maintaining the ecological balance thathuman beings ought to protect the endangered animal species.
1、Studies show that juvenile delinquency rates are twice as high foryoungsters from single-parent families as for those intraditional households. （同级比较）
六、英语句子成分
七、常用典型句式