正在被讨论的问题很重要
在这儿学习的学生主要来自工人家庭
和我们老师交谈的女士是他妈妈
在事故中受伤的那个人被送到医院
这就是他写的那本书
生活在沙漠中的蜘蛛不会织网
他们挖洞以便找到保护它们的庇护所
the issues being discussed are very importantthe students studying here mainy come from laboring classthe lady talking with our teacher is his motherthat man hurt in the accident has been brought to a hospitalthat is the book written by himthe spiders living in the desert cannot make websthey dig holes in order to find their shelters