评论
打印
第一段：
主题句：________has become a serious problem about which we worry.
扩展句：
1、Wherever we turn, we find ________.
2、And this is threatening the survival of the human race.
第二段：
主题句：The real problem with _______ is _____.
扩展句：
1、It is ____ that _____.
2、It is also _____ that ________.
3、Ironically, it is _______ itself that _____.
第三段：
结尾句：We must do something to solve _____.
扩展句：
1、First of all,we must let everyone see the imprtance of ____.
2、Then we _____
3、Only when everyone makes a joint-effcet to ____can this problem be solved.
