问2道英语语法题各位大侠好!请教各位两道英语语法题,问题如下：1、Investigators__into the fires at nine Baptist Churches in Alabama over the past week are hoping a handprint left on one church's front door may help catch the

问2道英语语法题
各位大侠好!请教各位两道英语语法题,问题如下：
1、Investigators__into the fires at nine Baptist Churches in Alabama over the past week are hoping a handprint left on one church's front door may help catch the perpetrator.
A.looks B.looked C.look D.looking
①这一题中,正确答案选D,答案解析说looking是（Who） look的省略,可难道不应该是（Who are） looking的省略吗?
②这一题的主语是Investigators,主语的谓语是哪个啊?是……past week 后面的 are?还是……front door后面的may help?如何分辨出来的呢?
2、At the symposium,the Prime Minister said that the Korean economy is facing greater economic hardships nowadays due to external variables such as soaring international crude prices and the strenthening of the Korean won,__a prolonged increase in exports.
A.despite B.in spite of C.although D.though
这一题中正确答案是A,因为C是连词所以不对吗?什么情况下可以选C（前面没有“,”的情况下吗?）,感觉这两个词的意思一样,选哪个都对呃……
真心感谢各位大侠的帮助!谢谢!

1、Investigators _ into the fires atnine Baptist Churches in Alabama over the past week are hoping a handprint lefton one church's front door may help catch the perpetrator.
 
主语部分：Investigators_ into the fires at nine Baptist Churches in Alabama over the past week
 
　　【主语核心名词】Investigators 一些调查人
　　【后置定语（分词短语）】lookinginto the fires at nine Baptist Churches in Alabama over the past week  上周整个星期对在亚拉巴马的九个浸礼教徒教堂进行调查的（调查人）
　　——分词短语作定语相当于定语从句 who lookinto the fires at …（初步调查）或who are looking into the fires at …（正细细调查着）的语法功能,由于是分词定语,并不过分强调究竟是look into 还是 are looking into.如果要强调这一点,就会用定语从句表示）
 
谓语部分：arehoping a handprint left on one church's front door may help catch theperpetrator.
 
　　【谓语动词（进行时）】arehoping 正期待着
　　【宾语从句】ahandprint left on one church's front door may help catch the perpetrator.其中——
  —主语：a handprint left on one church's front door 一个教堂正门左边的手印
  —谓语部分：may help catch the perpetrator.会有助于抓住作案者.
 
2、At the symposium,the PrimeMinister said that the Korean economy is facing greater economic hardshipsnowadays due to external variables such as soaring international crude pricesand the strengthening of the Korean won,__ a prolonged increase in exports.


　　A.despite 和 B.in spiteof 是介词,都表示“尽管”,前者语气缓和,后者比较强硬,后面需要用名词作宾语；C.although和 D.though 都是引导让步从句的连词,后面需要跟句子.
　　这里的a prolongedincrease in exports（出口长期的增长）是名词短语,前面只能用介词despite 或in spite of,这是两个同义词,意思一样.从修辞角度来说,这两个词中,前者语气缓和,后者语气较强.
　　though和although在意义上几乎毫无区别,但文体上后者是较正式用词,语气比though强.如果此处是 there is a prolonged increasein exports,就可以选用其中的一个.