小升初网整理了2017年小升初英语语法大全，供同学们参考，希望能够帮助同学们提高学习成绩。
21.The letter is from my sister， ______is working in Beijing.
A. which B. that C. whom D. who
22.In our factory there are 2，000 workers， two thirds of ____are women.
A. them B. which C. whom D. who
23.You‘re the only person ______I’ve ever met ______could do it.
A. who；/ B./； whom C. whom；/ D./； who
24.I lost a book， ______I can‘t remember now.
A. whose title B. its title
C. the title of it D. the title of that
25.Last summer we visited the West Lake， ______Hangzhou is famous in the world.
A. for which B. for that C. in which D. what
26.I have bought such a watch _______ was advertised on TV.
A. that B. which C. as D. it
27.I can never forget the day _______ we worked together and the day ______ we spent together.
A. when； which B. which； when
C. what； that D. on which； when
28.The way ______he looks at problems is wrong.
A. which B. whose C. what D./
29.This is the reason ______he didn’t come to the meeting.
A. in which B. with which C. that D. for which
30.This machine， ______for many years， is still working perfectly.
A. after which I have looked B. which I have looked after
C. that I have looked after D. I have looked after
参考答案及解析
21. D. who引导非限制性定语从句，who作从句的主语.
22. C. two thirds of whom 即：two thirds of the 2，000 workers.
23. D. 先行词person后有两个定语从句，第一个从句省略了关系代词whom.因为， whom作从句中 met的宾语，可以省略.第二个从句who could do it.who在从句中作主语，不可省略.
24. A. whose title引导非限制性定语从句，whose title也可以说成the title of which
25. A. for which 引导定语从句，使用介词for，是来自于从句中的固定短语 be famous for 以？？..而闻名.
26. C. 当先行词被such修饰时，引导定语从句的关系代词要用as. As在本从句中作主语.
27. A. 两个先行词the day都是表示时间的名词，但第一个空白处要填的关系词在从句中作状语， 因此要用关系副词when. 第二个空白处要填的关系词在从句中作动词spent的宾语，因此要用关系代词 which或that来引导定语从句.
28. D. 在way、distance、direction等词后的定语从句中，常用that来代替in (或其他 介词)+which、when或where，而that常可省略。
29. D. for which在定语从句中作原因状语，可用why 来替代.
30. B. which I have looked after 构成一个非限制性定语从句.
(