首先在这里先说明一下情况，因为我的错题是考试的历年真题来的。同时这次的考试对我来说很重要，希望各位前辈能够帮助我，谨慎作答，因为我会完全相信你们的答案的！谢谢！（题目比较多，如果越详细，解释越明白。我会最后提高财富值的）谢谢！
麻烦这些句子帮我分析出主句和从句，尽量详细，我会提高财富值，还有事怎么分析选出答案的？谢谢10.We consider_______the instrument shouldbe adjusted each time it is used.
A.that itnecessary B.necessary it that
C.it thatnecessary C.it necessary that --我选了A，答案选D
11.Upon graduation he asked to be sent to___________.
A.where he is most needed B.where he needed
C.where he is mostly meeded D.where is he mostly meeded ----我选了B，答案选D
12.The photos will show you _________.
A.what does thehouse look like B.what the houselooks like
C.how does thehouse look like D.how the houselooks like ---我选了B，答案选D
13.It has not been announced_______theplane is to take off.
A.how B.where C.when D.what --我选了B，答案选C
14.The question is_______we shall performthe experiment.
A.which B.who C.where D.that ---我选了D,答案选C
15._______we can raise our productionremains a problem.
A.Which B.How C.That D.Where --我选了C，答案选B
16._______his dream of going to collegewill come true is uncertain.
A.That B.Whether C.If D.Even if ---我选了A，答案选B