Ⅰ.单词拼写

　　1．Professor Sir Ian Wilmut has been undertaking (从事) cloning research for many years.

　　2．Cloning of animals is more complicated (复杂的) than cloning of plants.

　　3．They think the cloned animals like Dolly the sheep, which altogether (总共) lived only six years and a half, can't live a normal life.

　　4．The law forbids (禁止) building on this land.

　　5．Old people are usually more conservative (保守的) than young people.

　　6．This is a major breakthrough (突破) in cancer research.

　　7．Though he was not against the plan, he didn't make straightforward (直接的) replies.

　　8．Ordinary people would then be able to use them to obtain (获得) valuable information.

　　Ⅱ.拓展词汇

　　1．differ vi.不同；相异→different adj.不同的→difference n．差异；不同

　　2．exact adj.精确的；准确的→exactly adv.准确地

　　3．accumulate vt.积累→accumulation n．积累；增加

　　4．object vi.反对；不赞成→objection n．反对；不赞成；异议

　　5．correct adj.正确的；合适的vt.改正；修正→correction n．改正；修正；纠正

　　[巧记单词]

例词 规律 派生词 difference v.＋­ence→n. correction v.＋­ion→n. 合成词 breakthrough v.＋adv.→n. 　　Ⅲ.补全短语

　　1．make a breakthrough　取得突破

　　2．cast down 使失望；使沮丧

　　3．in favour of 支持；赞成

　　4．pay off 得到好结果；取得成功；偿清

　　5．object to 反对

　　6．have a great impact on ... 对......有巨大的影响

　　7．be appropriate to/for sth. 适合于......

　　8．on the other hand 另一方面

　　1．[教材原句]Cloning plants is straightforward while cloning animals is very complicated.

　　克隆植物比较简单，但克隆动物非常复杂。

　　[句型点拨]while在句中用作并列连词，意为"然而；却"，连接并列分句，表示前后意义上的对比。

　　[佳句赏析]Some people waste food while others haven't enough.

　　有些人浪费粮食，然而有些人却吃不饱。

　　2．[教材原句]Then came the disturbing news that Dolly had become seriously ill.

接着传来了多莉病重的坏消息。