核
心
单
词
1.threat n． 威胁； (灾难等坏事)发生的可能
2．switch vi.& vt. 转换，改变
3．species n. 物种，种
4．wipe vt. 擦；拭
5．decrease vi.& vt. 减少
n. 减少；减少的量
6．blame vt. 责怪，指责
7．wrap vt. 包，裹
8．relate vi. 相联系，有关联
9．essay n. 论说文；散文
10．organic adj. 不使用化肥的，有机的，绿色的
11．institute n. 机构；研究院
12．billion n. 十亿
13．opponent n. 反对者；对手，敌手
14．claim vt. 声称；断言；主张
n. 声称； (根据权力而提出的)要求
15．chemical n. 化学品adj. 化学的
16．carve vt. 雕，刻
Ⅰ.根据语境和汉语提示写出正确单词
1．They contain a harmful chemical (化学物质) that caused my liver to fail.
2．It took them more than one billion (十亿) dollars to complete the project.
3．I tried to comfort him after he was defeated by his opponent (对手)．
4．It is a good essay (论说文) apart from a few slight faults.
5．Organic (有机的) produce is likely slightly healthier to eat.
6．Can you put me through to the president office of the institute (机构)?
7．They claim (声称) to be the party of law and order.
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