几道高考英语选择题,本人精心归纳诚心求解,

几道高考英语选择题,本人精心归纳诚心求解,
1.-Why didn't you put your cellphone in your pocket?
-I ___,but I was afraid it would be stolen.
A.had put B.put C.would have D.could have put
我知道这个是考虚拟,对过去的虚拟.为什么不能选C?have后一定要加put吗?为什么?
2.We want such materials___ can bear high temperature and pressure.
A.that B.as C.what D.which
答案为什么是B?
3.___ he got the news,Mr Mathews hurried out of his house,and ___ his car,drove all the way to town.
A.When;started B.The moment;having started C.Until;starting D.Once;to start
第二空用having started的原因是什么?
4.What the movie "The year 2012"has displayed is __ but practical since ___depends on "if".
A.anything;everything B.nothing;everying C.everything;anything D.none;everything
这道题选A,但是我的语感是第一空应该为nothing but ...为什么?
5.-You look tired.
-Yes.I __ non-stop until 8 o'clock.
A.had worked B.work C.have worked D.was working
此题选D.我们老师的解释是 8 o'clock已经过去了所以选过去进行时.不过为什么不能选C,表示对现在有影响——look tired?
6.Between the two tall trees __ a farmhouse,in front of which ___ an old man,his eyes closed.
A.lies;is sitting B.stands;sits C.standing;does sit D.lying;sitting
此题选B,为什么不能用现在分词表示状态呢?而要用一般时?
7.Mr.Bob,__ as a manager for many years,found it hard to be an ordinary clerk again.
A.having worked B.worked C.to have worked D.working
此题选A.我知道因为后面有for many years,但是后一句found又是过去式,work是不是应该和它并列而用worked呢?
8.An important parents' meeting ____ tomorrow,all the class are busy cleaning the room.
A.given B.to be given C.giving D.to give
最后还有个问题——如何判断名词性从句和让步状语从句（就用 whatever 和no matter what 的情况）
因为我的英语老师虽然很有经验,但是她总是凭经验做题,一直讲不清为什么要选这个答案,所以只好求助于网络.这些题打了好久,希望有高手能解惑,本人不甚感激!