重点讲解：
1.communicate with
与…联系，与…交往； 与…相通
例句：Group members have to communicate with each other through role-play.
小组成员必须通过角色扮演互相交流。
2.run sb over
撞倒;碾压
例句：A truck runs her over, stops momentarily, then drives away.
一辆卡车从孩子身上碾过，停了片刻，立即开跑了。
3.lack of
缺少；不足；不够
例句：The lack of a social safety net is often blamed for the high Chinese saving rate.
缺乏健全的社会安全保障经常被认为是中国高储蓄率的一个原因。
4.give an alternative
做出选择
例句：Running clubs give singles an alternative to the bar scene
跑步俱乐部是单身人士酒吧之外的选择
5.think about
考虑；回想；思索
例句：He began to think about what he would do.
他开始思考他要做什么。