Some were insects. Others, called amphibians， 7.________(be) able to live on land as well as in the water.

　　Finally, some small clever animals appeared and spread all

　　over the earth. But they treat the planet in an

　　8.__________(friend) way, and the earth becomes too

　　9.________(pollute). Whether life will continue on the earth

　　for millions of years to come will depend on 10.________

　　this problem can be solved. Unit 4　Astronomy: the science of the stars were　 unfriendly　 基 础 自 主 梳 理 whether 　 polluted 　 返回目录 ◇ 单词点睛 ◇ harmful 　 adj. 有害的；伤害的(causing or capable

　　of causing harm)

　　(1)be harmful to　

　　对……有害

　　(2)do sb harm/do harm to sb

　　伤害某人

　　There is (no) harm in (sb's) doing sth

　　(某人)做某事有(无)害处

　　(3)harm n．& vt.

　　损伤；伤害

　　harmless adj.

　　无害的 Unit 4　Astronomy: the science of the stars 考 点 互 动 探 究 返回目录 【活学活用】 (1)[2015·江苏卷·阅读B] Many wastes produced in the

　　producing process are harmful as well.

　　在生产过程中产生的废品也是有害的。 (2)Scientists do not know how much and what kinds of

【2017届高考英语（全国卷地区）一轮总复习课件：必修3 Unit 4《Astronomy the science of the stars》】相关文章：

★ 【北京专用】2014届高考英语一轮复习方案课时作业：选修6 Unit 4 Global warming

★ 【人教版】2014届高考英语一轮复习指导考点针对练：选修6 unit4《Global warming》

★ 【人教版】2014届高考英语一轮复习指导考点针对练：必修5 unit1《Great scientists》

★ 2017届江苏省淮安市新马中学高考牛津译林版英语一轮复习活动单：模块6 Unit 1《Laughter is good for you》

★ 【浙江专用】2014届高考英语一轮复习课时作业(十八)必修4Unit 3《A taste of English humour》

★ 【北京专用】2014届高考英语一轮复习方案课时作业：必修5 Unit 4 Making the news

★ 2014届高考英语一轮复习课时作业(三十)必修5Module 6《Animals in Danger》（外研版）

★ 2014届高考英语一轮复习课时作业(二十七)必修5Module 3《Adventure in Literature and the Cinema》（外研版）

★ 2017届高考英语二轮复习课时训练：6（含解析）

★ 【浙江专用】2014届高考英语一轮复习课时作业(三十八)选修8Unit 3《Inventors and inventions》