Ⅳ Language points

1. even if 即使

Even if you know the secret you should keep silent.

即使你知道这个秘密，你也应该保持沉默。

2. close family 近亲

close friend亲密的朋友

Sit close against the wall. 紧靠墙坐着（指距离近）

close 势均力敌的；几乎相等的

a close game一场不相上下的比赛

3. contribute (oneself) to sth.

contribution n

make contribution to sth/sb

(1) 捐献、捐赠；捐（钱）

He contributed a lot of food and clothes to the poor.

他为穷人捐了很多的食品和衣服。

(2) 投身于，献身于...

He contributed himself to doing research.

他投身于研究工作。

(3) 投稿，撰稿。

He contributed poem to a newspaper.

他向报社投了一篇诗稿。

(4) 贡献

He made great contribution to the country.

他为国家做出了巨大贡献

He made great contribution to the invention of computer.

他对计算机的发明做出了巨大贡献。

4. ...help put crowns made of flowers...

= ...help put crowns which are made of flowers... 动词的过去分词可后置定语，也可以转换成被动语态的定语从句

Finally they found the pot buried underground.