高一英语（必修3）Unit4讲练与拓展
Book 3 Unit4 Astronomy:the science of the stars
atmosphere n
1、[C,U] 气氛，氛围，环境
[+ of ] An atmosphere of optimism dominated the conference. 乐观的气氛充满会场。
2、[U]魅力；情调；精彩：The castle was centuries old and full of atmosphere.
3、the atmosphere〔地球的〕大气（层）
4、[C] the mixture of gas that surrounds a planet 〔行星的〕大气（层）
5、[C usually singular] the air inside a room 〔室内的〕空气：a smoky atmosphere烟雾弥漫的空气
【即学即练1】选择适当关系词完成下列从句：
1、The teacher always tries his best to create an atmosphere in class __________________his students can practice their speaking skills.
2、She has a gift for creating an atmosphere for her students _____________allows them to communicate freely with one another.
time的有关知识点复习
lcross【即学即练2】选用sometime,sometimes,some time,some times填空：
1、The sales figures won?t be relead until ________________next month.
2、That idea has been creeping into our consciousness for _________________.
3、I am sure that we have met ______________before.
4、________________things have to fall apart to make way for better things.heir是什么意思
【即学即练3】选用at a time,at one time,at any time,at no time,at times,at all time,in no time,in time填空：
1、He gets clo to wildlife __________________,but only when the animals come to him.
2、You may u my dictionary ___________________.
3、He predicted that my hair would grow back _________________.
4、________________400 men,women and children lived in the village.
5、__________________did a majority of Czechoslavakia?s citizens support the country?s breakup.
6、The bedroom was kept ready and waiting for them ___________________.
7、We can?t do things well __________________.
8、If you keep on,you will succeed __________________.
【即学即练4】用括号内正确词填空：
1、It?s high time that the article __________________________(publish).
2、That wasn?t the first time Linda ___________________ (take)too many pills.
3、By the time I get home,they ______________________(leave).
4、Every time I ___________________(e) him,I found him to be taller.
5、It will be the fifth time that he _______________________(invite) to such a meeting.
6、（单句改错）At the last time I went to China,I visited Shanghai.
really的音标multiply v
1、[I,T] 乘，乘以→ divide
elf是什么意思multiply sth by sth：Multiply the total by 12.把总数乘以12。
2、[I,T] （使）大大增加，（使）倍增
The amount of information available has multiplied.
Smoking multiplies the risk of heart attacks and other health problems.
3、[I] to breed 繁殖：Bacteria multiply quickly in warm food.细菌在温热的食物里繁殖得很快。
【拓展】前缀multi为“许多，多个”的意思：multicultural adj.多元文化的；multimedia adj.多媒体的；multinational adj.跨国的，多民族的；multiparty adj.多党派的
【即学即练5】（）They were worried about their safety,for the bad weather ____the danger of their exploration. A.lesned B.multiplied C.ivated
system n
1、[C] 系统：an alarm system警报系统；a well-designed heating system设计良好的供暖系统
the digestive system消化系统；the railway system铁路系统
2、[C]体制，制度；一套办法，一套工作方法
system of/for doing sth：We?ve got a good system for dealing with complaints from customers.
under a system：Under the prent system, we do not have any flexibility.现行体制下，我们没有灵活性。
3、[C] 〔计算机〕系统：The system has crashed (= stopped working ) .系统崩溃了。
4、sb?s system某人的身体（状况）〔用于谈论病情或身体状况〕
All this overeating is not good for my system.这么大吃大喝对我的身体不好。
5、all systems go一切就绪〔有时为幽默用法〕
美孚英语
6、the system〔限制个人自由的〕既成秩序，现行体制，制度
forgive的名词You can?t beat the system .你无法超越现行体制。
7、get sth out of your system消除强烈的不快情绪
I was furious, so I went for a run to get it out of my system.我非常愤怒，便去跑步来消气。
8、[U]条理；秩序：We need a bit more system in the way we organize our files.
puzzle 1n [C]
1、拼图游戏，拼图玩具→ jigsaw：a child?s wooden puzzle儿童木制拼图
2〔需要动脑筋的〕益智游戏：a crossword puzzle纵横字谜游戏
3、[usually singular] 难题，难解之事，谜：The meaning of the poem has always been a puzzle.
长颈鹿的英语单词[+ of ]the puzzle of how the sun works太阳发光发热之谜
4、piece of the puzzle〔有助于理解难题、神秘事物等的〕信息，线索
puzzle 2v [T]
1、使困惑，使迷惑：He was puzzled by the reactions to his remark.
PHRVB 短语动词
default是什么意思（1）puzzle sth ←→ out 仔细考虑解决〔难题等〕
He lay looking at the ceiling, trying to puzzle things out.他躺在那里盯着天花板，想要弄明白是怎么回事。（2）puzzle over sth phr v仔细琢磨，冥思苦想：The class puzzled over a poem by Shakespeare.
【即学即练6】Facing the p_____________situation,Yu Zhenjun looked p_______________.
叶诗文兴奋剂【即学即练7】（）Thus far no one _______with a ___explanation of why dinosaurs died out.
A.has come up,convincing
B.came up,puzzling
