1. The pen __________ she wrote that book can now be seen in a museum.

2. The little creature ________ scientists are interested is known as ET.

3. The gun __________ he was shot was never found.

Step 6.特殊句式

1、关系副词引导的定语从句都可以改为介词+which的结构:

Do you remember the day when you joined our club?

This is the house where I lived two years ago.

I don't know the reason why he said so.

I don't like the way in which/that he talks.

2、关系代词whose+名词引导的定语从句可转化为 the+名词+of which/whom 或 of which/whom +the+名词结构。句中的of表示所属关系

He lives in a room, whose window faces west.

=He lives in a room, the window of which/ of which the window faces west.

The child was saved by a man, whose name was not known.

　=The child was saved by a man, the name of whom/ of whom the name was not known.

Step 7.高考常考句式

　1、数词+介词+关系代词( 含基数词，序数词，分数和百分数）

We have three foreign teachers, two of whom/of whom two are from Canada.

　2、代词+介词+关系代词（如：all, both, none, neither, either, some, any等）

The old woman has two sons, both of whom/of whom both are teachers.

3、形容词+介词+关系代词（最高级/比较级）句中的of表示部分与整体的关系

China has thousands of islands, the largest of which/of which the largest is Taiwan Island

4、介词短语+关系代词

They finally climbed up the mountain, on top of which many strange birds were seen.

5、 介词+关系代词+名词

He spent four years in college, during which time he studied medicine.（在那段时间内）

He spent four years in college；during that time he studied medicine.

Step 8.Summary

基本句式 prep. + which / whom