1．The letter that/which I received yesterday was from my father.
昨天我收到的那封信是我父亲寄来的。
2．She is the girl who lives next door.
她就是住在隔壁的女孩。
3．She's the student whose handwriting is the best in my class.
她就是我的班里书法最好的学生。
4. This is the pilot by whom my friend was saved.
这就是那位救了我朋友的飞行员。
5．I still remember the days when we stayed in England.
我仍然记得我们在英国的那些日子。
6．This is the mountain village where I stayed last year.
这是我去年待过的山村。
7．This is the reason why he was absent.
这就是他缺席的原因。
8．As is known to us all, China is a developing country.
众所周知，中国是个发展中国家。
9．The sports meeting was put off, which astonished us.
运动会推迟了，这让我们很吃惊。
10．Last week, only two people came to look at the house，neither of whom wanted to buy it.
