英语题目啊~~急~~~~~Some english questions~~~~~

Question

Is this film studio ___the students visited last week?
A.when B.where C.which D.the one
There are some cases___speech has started late in a child who eventually turn out to be of high IQ.
A.why B.which C.where D.as
The boy didn't believe the fact___.
A.that most of us thought it to be true
B.as most of us thought true
C.most of us thought to be true

怎么做定语从句啊~~

Answer 1

B从句中缺少了地点状语 visit +place
C从句speech has started late in a child who eventually turn
out to be of high IQ +in the case（case为地点状语）
C从句缺少宾语most of us thought （+something ）to be true

Answer 2

D the one 强调这个电影厂
B 一些案例显示晚说话的孩子比较聪明，用其他的不通
C 省略了that

Answer 3

第1题选c
这个是上星期学生参观的电影厂吗？
2 b
3 a