accepted it.

1．It is Henry Adams，an American businessman，who is lost in London and does not know what he should do.

[句式分析]　本句It is...who...为强调句结构，强调主语Henry Adams。an American businessman是同位语，对前面的Henry Adams进行解释说明。后面的what he should do为宾语从句，作know的宾语。

[自主翻译]　他叫亨利·亚当斯，是一个美国商人。在伦敦迷了路，不知道该做什么。

2．The fact is that I earned my passage by working as an unpaid hand，which accounts for my appearance.

[句式分析]　本句中that引导的是表语从句，which引导的是非限制性定语从句。

[自主翻译]　事实上我靠做义工来顶替船费，这就是我衣冠不整的原因了。

3．If this is your idea of some kind of joke，I don't think it's very funny.

[句式分析]　本句为复合句结构。主句是I don't think it's very funny，其中it's very funny是省略that的宾语从句。If this is your idea of some kind of joke是条件状语从句。

[自主翻译]　如果你们认为这是一个笑话，我不认为它很好笑。

Ⅰ.阅读理解

　　Mark Twain，the famous American writer，liked to play jokes on others.But once a joke was played on him.

　　One day Mark Twain was asked to give a talk in a small town.At lunch he met a young man he knew who told him that he had an uncle who never laughed or smiled.The young man told Mark Twain that nobody and nothing could possibly make his uncle smile or laugh.

　　"You bring your uncle to my talk tonight，" said Mark Twain."I'm sure I can make him laugh."

　　That evening the young man and his uncle sat in the first row.Mark Twain spoke directly at the old man.He told some rather interesting stories，which made everyone in the hall laugh.But the old man never even smiled.Mark Twain told the most interesting stories he knew.But the old man's face was still a blank.At last Mark Twain stopped.He felt tired and discouraged.

Some days later，Mark Twain told a friend of his about what had happened."Oh，" said his