(3,4)重点词汇1. n.[c] 系统；体系；制度；方法systematic adj 有系统的; 有条理的[典例]The solar system includes the sun and its eight planets.[练习] 根据意思完成句子。

1). The ______ ______ (教育系统) operates very differently in the US and China.2). He introduced us a well-designed ______ ______ (铁路系统).2. vt. (laid, laid, laying) 把放下；摆设；铺(地毯) ；产(蛋)[典例]1). He laid his hand on my shoulder.2). Who should we lay the blame on?[重点用法] lay短语：lay eggs 下蛋lay sth. aside 把某物放在一边；积蓄（钱）lay sth. down 把某物放下lay the blame on sb.责备某人lay the table 摆桌子lay emphasis / stress on sth. 把重点放在某事上；强调[练习] 根据句子的意思在括号里填入适当的词或翻译。

1). The bird ______ its eggs in other birds’ nests.2). He is a political leader that _____ _____ _____ _____ (非常强调) individual responsibility.3). He ______ some money ______ for rainy days.3.adj. 有害的；伤害的harm n.&vt. 伤害（某人）其反义词为harmless [典例]There is no harm in doing sth./It does no harm to do sth.做某事是个好主意(或没有坏处)①It is harmful to your health to drink too much.②He may say no，but there’s no harm in asking.[重点用法]be harmful to sb./sth. 对……有害do harm to sb.= do sb. harm = harm sb. 对……有害；伤害……[练习] 根据句子的意思在括号里填入适当的词或翻译。

1). Everyone knows that smoking is ______ to your health.2). In many cases, too much care for children from parents might even do ______ to their growth.3). 在阳光下看书对你的眼睛伤害很大。

_______________________________________________________________________________ Doctors always tell us that drinking too much________our health，but some people don’t care. A．is harm to B．does harmful to C．is harmful to D．do harm to4. vi. 存在；生存existence n. 存在[典例]1). Does life exist on Mars?2). I can hardly exist on the wage I’ m getting.[重点用法]exist + prep. 存在于地方exist on sth. 靠某物生存[练习] 用exist的短语或其适当形式填空。

1). This plant ______ only ______ Australia.2). Can you ______ ______ such a low salary?3). I doubt the ______ (exist) of alien.5.vt.&vi. (使)迷惑；(使)苦思n.谜；难题puzzled adj.无法了解的；困惑的puzzling adj.令人费解的[典例]Their reason for doing it is still a puzzle to me.①Her puzzled look on her face suggested she didn’t understand what I said.②I have been puzzling about this question for weeks.[重点用法]sth. puzzles sb. 某事使某人迷惑/为难sb. be puzzled by sth. 某人对……感到迷惑puzzle about/over sth. 对某事感到迷惑或苦苦思索（以便理解）puzzl e one’ s brain苦思苦想；绞尽脑汁solve a puzzle 解决一个难题[练习] 用puzzle的适当形式填空或翻译。

1). To explain the ________ (puzzle) findings, he offers two theories.2). _______ _______ _______ (使我困惑的事情) is why he left the country without tellinganyone.3). She listened with a _______ (puzzle) expression on her face.4). No one has yet succeeded in explaining the _______ (puzzle) of how life began.完成句子She has lost heart since she failed in the exam.She_______________(对将来感到迷茫)．6.v.拉，拖，拔；移动n.拉，拖；拉(引)力[典例]1). You push a nd I’ ll pull.2). I felt a pull at my sleeve and turned round.①He pulled the door open and rushed out.②The police car signalled to us to pull in.③We waved as the train pulled out of the station.④The doctor told me that I would pull through.[重点用法]pull off (sth)（指机动车辆）驶离（道路）（至路侧停车处停下）pull out (sth.) 拉掉；使分离；掏出；驶离（车站）pull down拆毁；摧毁pull in(车辆)进站停靠；靠边停靠pull through康复；痊愈pull together 同心协力；通力合作[练习] 用pull短语的适当形式填空。

1). I arrived as the last train was ______ ______.2). He ______ ______ a gun and aimed at the criminal.3). So long as we ______ ______, there’ s no mountain we can’t conquer.用pull的短语填空：(1)Houses were______________to make way for a new highway.(2)Cheer up！Take more exercise every day and you will______________.(3)John________behind me and parked.7.vt. & vi. (使)高兴、振奋；(对)欢呼cheerful adj.高兴的cheerless adj.不高兴的[典例]1). The crowd cheered loudly as the Queen appeared.2). He was greatly cheered by the news.[重点用法]cheer sb. on为某人加油cheer (sb) up（使某人）更高兴或更快活[练习] 用cheer的短语或其适当形式填空。

1). Your visit has greatly ______ him up.2). The crowd ______ the runners ______ as they started the last lap.重点词组1. = to start with 以……开始；由……作为开头；首先[典例]To begin/start with, I couldn’ t understand a single word.[重点用法]begin/start with 从……开始begin/start sth with 从……开始……[练习] 根据句子的意思完成句子。

1). He ______ his speech ______ a poem.2). His speech ______ ______ a poem.3). ______ ______ ______, pets are good friends of many lonely people, especially the old.2. 及时；最终；迟早[典例]①He managed to send the tourists to the airport in time.②Will you be home in time to see the children before they go to bed？③If you keep on，you will succeed in time.④At one time，half the land on the Earth’s surface was covered by for est.⑤You must give your homework to the teacher on time.[短语归纳] time短语：in time for sth./ to do sth. 及时；不迟in no time 立刻；马上at no time永不……at one time 有个时期；曾经；一度at a time 一次；每次at times = sometimes 有时all the time 一直；始终；老是on time 按时；准时by the time到……的时候为止for the time being 暂时；暂且kill time 消磨时间from time to time 不时地，间或many a time 常常；多次once upon a time 从前at the same time 同时；尽管如此ahead of time 提前，提早race against time 争分夺秒keep time (钟表)走得准 keep bad time（钟、表）走得不准take one’ s time 慢慢来，别急have a good/nice/hard time (in) doing sth 做某事很……It’ s (high/about) time that sb. did/ should do sth. 是做某事的时候了[练习] 用time短语填空。