Unit 5 Meeting your ancestors 核心单词1. alternativen.可供选择的事物；（两者或以上）可能的选择adj. 供选择的, 二选一的常用结构：have no alternative but to do sth.只能做某事；除¡¡外别无选择We have no alternative but to go on.除了继续下去,我们别无选择。There was no other alternative but to fight till the victory. 除了战斗到胜利,别无选择。 联想拓展：alternatively adv. 或者，二者择一地alternate vt. 使交替；vi.交替；adj. 交替的；轮流的高手过招：(1)单项填空In this school, the students have three courses, and seven courses. （2010¡¤01¡¤陕西师大附中月考）A. required; alternative B. requiring; alternative C. required; alternate D. requiring; alternate解析：选A。require(尤指根据法规) 规定、需要，此处用过去分词required修饰courses，因为两者之间为被动关系。后空意思为¡°选择，选其一¡±，alternative符合句意。 (2)单句改错 （原创）①I had no alternative but report him to the police. ②You have the alternative to speaking or keeping quiet. ③Tom and Harry do the work on alternative days.答案：①report前加to ②to→of③alternative→ alternate 2. arrest vt. 逮捕，拘留，吸引(注意)n.[C]逮捕常用结构：be arrested for sth. 因某事而被捕arrest one s attention吸引某人的注意under arrest被捕；被拘留The criminal was arrested yesterday.那名罪犯昨天被捕了。What she did arrested my attention. 她所做的吸引了我的注意力。高手过招用适当的介词或arrest 的适当形式填空 （原创）①I got arrested careless driving.②Her uncle was arrest, but nobody knew the reason. ③Five youths in connection with the attack. ④The public applauded the of the criminal suspect.联系方式 QQ:1365602590 邮箱：zxjkw@163.com1答案：①for ②under ③were arrested ④arrest 3. preservev.保护,维持,保存常用结构：preserve sth. from 使¡¡免遭¡¡You can preserve meat or fish in salt.你可以用盐保存肉或鱼。It is one of the duties of the police to preserve public o...
