Unit 5 Meeting your ancestors
[pic]核心单词
1. alternative
n.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. requi...点击查看全部>> red; 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→of
③alternative→ 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.
答案：①for ②under ③were arrested ④arrest
3. preserve
v.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 order.
警察的职责之一是维持公共秩序。
联想拓展：
preservable adj. 可保存的
preservation n. 保存
preserver n. 保护者，保存者
易混辨析：
preserve/conserve/reserve/protect
preserve v. 保护，维持，保存；
conserve v.保存，保护，强调珍惜；
reserve v. 指意见、看法的保留或座位的预定；
protect v. 保护，强调使其免受破坏或损害。
高手过招
(1)单项填空
①In spite of failing to save every endangered species, we may preserve the
majority extinction.
（2010¡¤山东枣庄一轮验收）
A. Against B. with C. beyond D. from
②It is the duty of the police to social order.
（原创）
A. Save B.reserve C.preserve D. rescue
①解析：选D。preserve sth. from 使¡­¡­免遭¡­¡­，符合句意。
②解析：选C。A、D两项都意为¡°拯救¡±；B项意为¡°保留，保存¡±；C项意为¡°保护，维
持¡±。根据句意可知，选C。
(2)完成句子 （原创）
①夏天收获的大量水果可冷藏或装瓶加以保存。
In the summer, large crops of fruit may by freezing or bottling.
②我认为这些有趣的旧习俗应该保存下去。
I think these interesting old customs .
答案：①be preserved②should be preserved
4. relief
n.减轻，解除
常用结构：
bring /seek/find/give/feel relief
带来/寻求/找到/予以/感到解脱
much to ones relief=to ones great relief
使某人宽慰的是¡­¡­
relief road 备用车道
relief map 地形图
I felt great relief when I heard I had passed the examination.
当听到已经通过考试时，我感到轻松了许多。
联想拓展：
relieve ones feelings 发泄感情
relieve sb. of 使某人解除
The minister was relieved of his post.
部长被解除了职务。
高手过招：
单项填空
Hearing the news that her son was found, she breathed a sigh of
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