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Prevent spread blindness
develop hold afford
board set up secretary
重点从词性、词义上辨别讲解
词组：do harm to=be harmful to
by following these steps.
二、选择题，学生讲评分析（小组长）
A组
1.be full of /be filled with
2.if---如果/是否
3.not ….until
三、作文批阅，师生讲评
B组 结合讲义口头分析
live (mainly) on
There were many trees around.
Some people cut down many tree to make money.
四：课堂小结
1.重点错句：
He is over 70 years old.
He has no children.
He has no daughtars or sons.
2.单词拼写
He spent most of his money helping children in poor areas to go to school.