1). We have taken effective measures _________ (preserve) our natural resources.

2). I think these old customs should _________ (preserve).

3). The aim of the policy is the _________ (preserve) of wildlife.

Keys: 1). to preserve 2). be preserved 3). preservation

6. advance vi.前进 vt. 预先发放，提前 n. 进展 advanced adj. 高级的；先进的

[典例]

1). Our troops have advanced two miles. 我们的部队已经前进了两英里。

2). We benefit from the continued advance of civilization. 我们得益于文明的不断进步。

[重点用法]

advance on/towards sb/sth 向某人/物前进 advance in sth 改进/改善某物

in advance (of sth) = beforehand = ahead of time 预先，事先，事前

[练习] 根据句子的意思在括号里填入适当的词或翻译。

1). We are proud of the recent advances _______ (介词) medical science.

2). The airline suggests booking tickets 21 days _______ ________(预先).

3). I should warn you _______ ________(事先) that I' m not a very good dancer.

4). The gangsters advanced _______ (介词) us shouting angrily.

5). Despite his ________ (advance) age, he often travelled abroad.

Keys: 1). in 2). in advance 3). in advance 4). towards/on 5). advanced

V 重点词组 （旨在提供综合运用所需材料）

1. be famous/known for 由于......而闻名；以......而著称

[典例]

1). The area is famous for its green tea. 这个地区以绿茶出名。

2). New York is known for its skyscrapers. 纽约以其摩天大楼驰名。

[重点用法]

be famous/known as sth. 作为......而被知道，了解

be famous/known to sb. 被某人所知道

[练习] 根据句子的意思在括号里填入适当的词或翻译。

1). Hangzhou _______ _______ _______ (由于......而闻名) its beautiful West Lake.

2). Chaplin is famous ________ his films.

3). Chaplin is famous ________ an artist.

4). He is known ________ the police.

Keys: 1). is famous for 2). for 3). as 4). to

2. no wonder = it' s no wonder that... 难怪；不足为奇......

[典例]

1). You went to bed at 4 am. No wonder you are so tired. 你早上四点才睡觉，难怪你这么疲倦。

2). It is no wonder that he has passed the exam. 难怪他考试及格了。

[重点用法]

It is a wonder that... 真想不到，令人惊奇的是...... do/work wonders 创造奇迹

wonder to do sth 惊讶(奇怪)干某事 wonder that... 感到奇怪，觉得惊讶

wonder whether (if)/when/why/how... 想知道是否／什么时候／为什么／怎么......