有没有人可以帮忙找一点关于定于从句的题目

1.The scientists and technicians overcame a lot of difficulties __ the personal computer.
A.they had developing B.having developing
C.they had developed D.which has to develop

2.Alf used to get __ he gets now.
A.five times the money B.as much five times money as
C.twice the money as much as
D.twice as much as the money

3.I can't think of many cases __ students obviously knew a lot of English words and expressions to write a good essay.
A.why B.which C.as D.where

4.This is the question __.
A.that we've had so much discussion
B.we've discussed about
C.we've had so much discussion about
D.of which we've discussed

5.The curous boy didn't believe the fact__.
A.most of us thought to be true
B.that most of us thought it were to be true
C.what most of us thought was true
D.as most of us thought true

6.Never give him more mone