15．identical adj. 完全相同的，同一的

　　16．clone v. 克隆

　　17．fundamental adj. 基本的，不可或缺的，重要的

　　18．controversial adj. 有争议的

　　19．contradictory adj. 互相矛盾的，相反的，对立的

　　20．flexible adj. 易适应的

　　21．compulsory adj. 强制的，强迫的

　　22．regulation n. 法规，条例

　　23．handy adj. 方便的，便利的

　　24．analyse v. 分析

　　25．suspect n. 嫌疑人

vt. 猜疑

　　 [用所给词的适当形式填空]

　　1．He took a deep breath to breathe the fresh air.(breathe)

　　2．The traffic accident that happened yesterday terrified Mary.It was really a terrifying experience to her，and now she is still terrified at the thought of getting on a bus.(terrify)

　　3．Everyone knows the benefit of learning English and if you work hard, it will be beneficial to your future career. It is reported that many graduates have benefited from having a good command of English.(beneficial)

　　4．The dog is a good companion and it keeps the little girl company all the time，and even accompanies her to school.(accompany)

　　1．burn__out (火)燃尽，烧完自灭

　　2．contrast__with 与......形成对照

　　3．throw__oneself__on... 扑倒在......上

4．again__and__again 一再，屡次