18. Tell apart 识别，辨别　 如：

The twins are so much alike that we can hardly tell them apart. 这对双胞胎太像了，我们几乎分不出来谁是谁。

▲ tell … apart　　 　tell A from B 　　　tell the difference between A and B

　 distinguish A from/and B　　　 　make a distinction between A and B

你能区别开简和露丝吗？

Can you tell Jane and Lucy apart? 　　　　　　Can you tell Jane from Lucy?

Can you tell the difference between Jane and Lucy? 　Can you distinguish Jane and/from Lucy?

Can you make a distinction between Jane and Lucy?

17. observe vt.　　　 观察, 观测, 遵守, (搭配：observe sb do/doing sth)

observe the speed limit; 遵守速度限制；

observe a child's behavior. 观察一个孩子的行为

One must observe the rules. 我们(任何人)必须遵守规则。

16. (1) 以一般疑问句出现

Was ___ that I saw last night at the concert?

　 A　 it you 　B not you 　　C　 you　 　D that yourself

(2) 以特殊疑问句形式出现

____ is it ____ has made Peter ___ he is today?

　A　 What; that; that　 B　 That; that ; what　 C　 What; what; that　 D　 What; that ; what

(3) 以名词性从句形式出现

I’ve already forgotten ____ you put the dictionary.

A　 that it was there　 B　 where was it that　 C　 that where it was　 D　 where it was that

(4) 与定语从句相结合

It was in the lab ____ was taken charge of by Professor Harris _________ they did the experiment.

　A　 which ; that　 B　 that; what　 C　 whom; that　 D　 which; where

(5) 与not ..until 句型结合

It was not until it got dark that I left.

另外，注意与有it 的定语从句相区别：

It was midnight when he came back.

It was at midnight that he came back.

15. take turns doing 轮流做某事

take turns (in sth / to do sth) 依次。轮流

The male and female birds take turns in sitting on the eggs.　 雄鸟和雌鸟轮流伏窝。

We take it in turns to do the housework. 我们轮流做家务。

in turn 依次，轮流，相应地，转而

The children called out their names in turn. 孩子们依次报出自己的名字。

Increased production will, in turn, lead to increased profits.增加生产会继而增加利润。

By turns　 adv. 　轮流, 交替

Beneath her external calm, she raged and felt frightened by turns.

14. get hold of 抓住

引申：catch/get/lay/seize/keep hold of 抓住，握住，捕捉，获得

13. remark v.

①说出，叙述

She remarked that it was getting warmer and warmer. 她说天气已经渐渐暖和起来了。

“Money is the most important thing,” he remarked ironically.

他用嘲讽的口气说：“钱是最重要的东西”。

②remark on/upon就某事，某物发表意见

The guests remarked on her new dress. 来宾对她那件新衣服品头论足。

I couldn’t help remarking on her youth.我脱口而出说她那么年轻。

③n.意见，评论，感想

pointed, cutting remarks直言不讳的，尖刻的评论

make a few remarks about sb/ on a subject讲几句有关某人/某问题的话

Don’t make rude remarks about their appearances.不要口没遮拦，批评他们的外表。

12. She loved him and wanted to keep him out of trouble.她爱他而且想帮助他免受麻烦。

▲keep的基本用法

①keep作连系动词，意为“继续处于某种状态或地位；留下；保留”，其后通常接形容词、副词等作表语。

Please keep quiet-I'm trying to get some work done. 请安静--我要处理一些工作。

②“保存；保留；保持”　

Keep the seat for me,will you? 替我保留这个座位，好吗？

His watch keeps good time. 他的手表走得准。

You can keep the book for two weeks.这本书你可以保存(借)两个星期。

③“使……保持在(某种状态)”，其后通常接复合宾语，可用形容词、介词、副词、现在分词、

过去分词等作宾补。　

His illness kept him in bed for months.他因病卧床好几个月。

We'll keep you informed.我们将让你知道情况。

Sorry to have kept you waiting for such a long time. 对不起，让你久等了。

It's our duty to keep our surroundings clean. 保持我们周围环境清洁是我们的职责。

④“履行；遵守”　

keep one's word 讲话算数 　keep one's promise 履行诺言 keep regular hours 生活作息有规律

⑤“赡养；饲养”

He has his wife and four children to keep.他要养活妻子和四个孩子。

He likes to keep some birds for fun.他喜欢养鸟玩。

⑥“过(节)；料理；记(日记)”

keep Spring Festival 过春节 　keep house 管理家务 keep a diary 记日记

▲keep的常用习惯搭配

①keep back 保留；隐瞒；阻止……向前。　

She couldn't keep back her tears at the news. 听到那消息，她忍不住掉下了眼泪。

The boss kept back 100 dollars from his salary for nothing.

老板无端地从他的薪水中扣去了100美元。

②keep in touch with...与 ……保持联系。

While he was outside the ship, he kept in touch by telephone with his companion and with the earth. 当他在飞船外面时，他用电话与同伴及地面上保持联系。

③keep on(doing sth.) 继续(做某事)；反复(做某事)　

Keep on trying, and you'll make greater progress. 继续努力，你将取得更大的进步。

④keep...out 不让 ……进来。

There is a lot of air in loose snow, and this helps to keep the cold out.

在松散的积雪里有许多空气，这有利于御寒。

⑤keep...out of...使……不进入……，使……置身于 ……之外

Please keep him out of trouble while he is studying here.

他在这里学习期间，请不要让他有什么麻烦。

⑥keep up坚持；保持；不使(斗志等)下落。

They can keep up their normal body temperature even in very cold weather.

他们即使在很冷的天气里也可保持正常体温。

⑦keep up with保持；维持；继续；跟上。　

John was not good at maths and he couldn't keep up with the rest of the class.

约翰数学学得不好，他跟不上班上的其他同学。

⑧keep watch守望；值班；放哨。　

They used to keep watch at the top of the tree during the war.在战争期间他们通常在树顶上放哨。

⑨keep away from (使)离开；远离。　

In order to reduce diseases we should keep animals away from body in daily life.

为了减少疾病，在日常生活中我们应该远离动物。

Who was it_______ you that telling lies is bad manners?

A.that convinced　　 B.who convinced　　 C.which convinced　　 D. convincing

[答案]A。此句是强调句式特殊疑问句形式，为避免重复用who，不用who，句意“是谁让你明白撒谎是不礼貌的行为！”

11. meanwhile adv

①其间，在这期间

The train won’t leave for an hour. Meanwhile ,we can have lunch.

火车在1小时内不会开走，在这期间我们可以吃午餐。

I went to college. Meanwhile , all my friends got well-paid jobs.

我上大学去了。那时我的朋友全都找到了收入不错的工作。

②另一方面

In the accident ,many people were killed, but meanwhile there were some who were unhurt.

在那次事故中，许多人丧生，不过也有一些人没有受伤。

n.=meantime

(用the meantime) 其间，在这期间；另一方面

in the meantime其间，在这期间；另一方面

The conference will begin in an hour; in the meantime, let’s have coffee.

一小时后会议就要开始了，在这期间，我们来喝咖啡吧。

9. would改为should

8. wrongly改为wrong