归纳拓展：

①absorbed adj. 被...吸收住，专心致志

②be absorbed in 被...吸引，专心致志于...

The boy was absorbed in the book when I came into his room.

当我走进他的房间的时候，这个男孩正在专心致志的读书。

4. brief adj. 短暂的，简短的

常用结构：

①brief introduction 简介

②in brief (=briefly) 简单地说，简言之

In brief, we should make a success of the conference. 总之，这次会议我们要开好。

5. expectation n. 期待的事物，预期

归纳拓展：

①expect 期望，期待，预料

②expect to do sth. 期望做某事

He paused as if expecting Mary to speak. 他停了停，好像希望玛丽说话似的。

③expect sth. from sb. 预料/期待/盼望...

④expect too much from sb. 对某人期望过高

⑤unexpected adj. 意外的，想不到的

⑥in expectation of 预计会有，期待，期望

6. get used to 习惯于

You'll get used to the weather in Nanjing in time. 你迟早会适应南京的气候的。

归纳拓展：

①be/get used to sth. / doing sth. 习惯于...

I am not used to getting up early. 我不习惯于早起。

②be used to do sth. 被用来做某事

③be used for sth. / doing sth. 被用来做某事

A knife is used for cutting things. 刀子是用来切割东西的。

④be used as... 被用作...

⑤used to do sth. 过去常常做某事

7. to avoid getting... 为了避免...

归纳拓展：

①avoid doing sth. 避免做某事

She avoids making you feel stupid. 她避免让你感到自己愚笨！

8. exchange vt. 兑换，交换 n. 交换，兑换，交易所

常用结构：

①exchange sth. with sb. 与某人交换/交流某事物

Our school does an exchange with a school in France. 我们的学校与法国的一所学校进行交流。