求大神做下英语定语从句题目八个,

求大神做下英语定语从句题目八个,
41.Do you knowthe reason ____ she has changed her mind?
A.why B.which C.for that D.of which
42.He failed inthe exam,____ proves that he wasn’t working hard enough.
A.which B.what C.it D.that
43.During theweek ____ he tried to collect materials for his article.
A.following B.followed C.to follow D.thatfollowed
44.____ wasexpected,he succeeded in the exam.
A.It B.Which C.As D.That
45.He studiedhard and later became a well-known writer,____ his father expected.
A.that was what B.what was that C.and whichwas D.which was what
46.We should readsuch books ____ will make us better and wiser.
A.when B.as C.whose D.what
47.You must showmy wife the same respect ____ you show me.
A.when B.as C.whose D.what
48.He is absent____ is often the case.
A.what B.which C.who D.as
49.It is thefirst time ____ I have come to your city.
A.that B.which C.what D.when