请帮忙解析定语从句题

请帮忙解析定语从句题
1、Who _______ has seen the TV film doesn’t admire it?
A.that B.who C.which D.as
这句我知道填 that 但翻译不出来.
2、You can never imagine what great trouble I have had ________ the patient who received a serious wound.
A.treat B.to treat C.treating D.treated
这句我知道have trouble (difficulty) doing sth.做某事有困难.填C,但还是翻译不出来.
3、This book will show you ________ can be used in other contexts.
A.how you have observed B.what you have observed
C.that you have observed D.how that you have observed
这句完全不会
4、The reason is ______ he is unable to operate the machine.
A.because B.why C.that D.whether
这句是表语从句吗?
5、I’ll tell you _____ he told me last week.
A.all which B.that.C.all that D.which
这句的先行词是什么 you?,怎么翻译?
6、----“How do you like the book?”
----“It’s quite different from _____ I read last month.”
A.that B.which C.the one D.the others.
这句的答案是C,但先行词是什么?是不是强调句?
7、Mr.Zhang gave the textbook to all the pupils except _______ who had already taken them.
A.the ones B.ones C.some D.the others
这句的答案是D,先行词是什么,除了“谁”之外都接受了?
8、He has lost the key to the drawer _______ the papers are kept.
A.where B.in which C.under which D.which
这句没搞懂,
9、The dinner was the most expensive meal we ______.
A.would have B.have had
C.had never had D.had ever had
这句答案是D,可为什么不是B呢,我觉得B比较合适.
10、Do you know which hotel _______?
A.she is staying B.she is staying in
C.is she staying D.is she staying in
这句答案是B 为什么不是倒装D呢?
11、They were interested _______ you told them.
A.in which B.in that C.all that D.in everything
这句的先行词是什么?
12、The astronaut did many experiments in the spaceship,________ much help for knowing space.
A.which we think it is B.which we think are of
C.of which we think is D.I think which is of
这句没搞懂,请给我解析一下,