39. You can depend on whatever promise _______ he makes.
A. / B. why C. when D. whose
40. Smoking, _______ is a bad habit, is, however, popular.
A. that B. which C. it D. though
41. --- Did you ask the guard _______ happened?
--- Yes, he told me all _______ he knew.
A. what; that B. what; what C. which; which D. that; that
42. I shall never forget those years _______ I lived on the farm with
the farmers, _______ has a great effect on my life.
A. when; who B. that; which C. which; that D. when; which
43. The number of the people who _______ cars _______ increasing.
A. owns; are B. owns; is C. own; is D. own; are
44. During the days ________, he worked as a servant at the Browns.
A. followed B. following C. to follow D. that followed
45. Is oxygen the only gas _______ helps fire burn?
A. that B. / C. which D. it
46. The clever boy made a hole in the wall, _______ he could see _____ was going on inside house.
A. which; what B. through which; what C. through that; what D. what; that
47. Is _______ some German friends visited last week?
A. this school B. this the school C. this school one D. this school where
48. John got beaten in the game, _______ had been expected.
A. as B. that C. what D. who
49. I have bought two ballpens, _______ writes well.
A. none of them B. neither of them C. neither of which D. none of which
50. All that can be eaten _______ eaten up.
A. are being B. has been C. had been D. have been
定语从句的详细讲解
定语从句在句中做定语，修饰一个名词或代词，被修饰的名词词组或代词即先行词。定语 从句通常出现在先行词之后，由关系词（关系代词或关系副词）引出。
关系代词有：who, whom, whose, that, which等。
关系副词有：when, where, why等。
1 关系代词引导的定语从句
关系代词所代替的先行词是人或物的名词或代词，并在句中充当主语、宾语、定语等成分。关系代词在定语从句中作主语时，从句谓语动词的人称和数要和先行词保持一致。
1）who, whom, that
这些词代替的先行词是人的名词或代词，在从句中作主语和宾语。例如：
Is he the man who/that wants to see you? 他就是你想见的人吗？（who/that在从句中作 主语）