Unit 4 I used to be afraid of the dark.Saturday 星期六(Section B 3a—Self Check)一、核心词汇general ， introduction (Section B 3a-Self Check)二、经典句子My life has changed a lot in the past few years. 在过去的几年里，我的生活发生了很大的变化。 (Section B 3a-Self Check)三、基础复现天天练：关注留守儿童问题 (Section B 3a-Self Check)题型体裁词数难度 建议完成时间正确率阅读 A篇说明文 312 words★★★☆☆7 min _____/5 (Section B 3a-Self Check) With the rapid( 快速的 )development of Chinese economy( 经济 ) ， more and more village people go to cities for work. This is a general problem in the countryside. As a result ， a special group of children who are called “left-behind children” come into being. Here is an introduction about the relationship between parents and left-behind children. (Section B 3a-Self Check)Percentage( 百分比 )Communication8.7% of left-behind childrenhave no contact( 联系 )with their parents at all49.7% of left-behind childrenprefer to live with their parents ， but they can’t24.25% of left-behind childrendo not speak much to their caregivers( 看护人 )and hate parents (Section B 3a-Self Check)Result:According to this survey ， it’s easy to find that most left-behind children have difficulties in communicating with parents. Therefore ， many left-behind children become problem children. They are always absent from① classes. Then bad people may approach( 接近 )them and have great influence on them. They also may have difficulties in communicating with teachers ，classmates and any people around them. (Section B 3a-Self Check) There is a song which writes that “Dad and Mum ，since you leave home ， I have learnt self-care ， I have learnt cooking ， I have learnt feeding pigs and chickens. Dad and M...
