(一)
1. Opposite is St.Paul's Church，________you can hear some lovely music.
解析：句意：对面是圣保罗教堂，在那里你能听到一些美妙的音乐。这是一个定语从句，先行词是St.Paul's Church，在从句中作地点状语。
答案：where
2. The number of smokers，________is reported，has dropped by 17 percent in just one year.
解析：分析句子结构可知，空处引导非限制性定语从句，指代的是整个主句的含义，as引导非限定性定语从句时，表示“如同，正如”。
答案：as
3. The boss of the company is trying to create an easy atmosphere________his employees enjoy their work.
解析：句意：公司老板正尽力创造一种轻松的气氛，在这种气氛中，其员工喜欢他们的工作。句中先行词为atmosphere，在从句中作地点状语，故用关系副词where。
答案：where
4. Some experts think reading is the fundamental skill upon________school education depends.
解析：句意：一些专家认为阅读是学校教育所依赖的基本技能。depend on/upon“依靠，依赖”，介词后只能用which或whom来构成定语从句的引导词。
答案：which
5. A company ________ profits from home markets are declining may seek opportunities abroad.
解析：句意：国内市场利润正在下降的公司可以去国外寻找机会。本题考查定语从句。先行词为company，将先行词代入定语从句后为：The company's profits from home markets are declining.由此可见关系词在定语从句中作定语，故填whose。
答案：whose
6. Please send us all the information ________ you have about the candidate for the position.
解析：句意：请把你拥有的关于竞聘这个职位的那个候选人的所有信息发给我们。在本句中，先行词the information被all修饰，所以只能填关系代词that，而不填which。
答案：that
7. Until now，we have raised 50,000 pounds for the poor children，________ is quite unexpected.
解析：句意：到目前为止，我们已经为那些贫穷的孩子们筹款50,000英镑，这非常出乎我们的意料。根据句子结构可知设空处引导非限制性定语从句，先行词是前面整个句子，关系词在定语从句中作主语，所以填which。
答案：which
(二)
1.I'm sorry not to have replied to your letter earlier，for________，I must say，I apologize.
解析：句意：很抱歉没能早点给你回信，对此我必须道歉。考查定语从句。从句中I must say为插入语，可忽略不计。定语从句的先行词为前面“not to have replied to your letter earlier”这件事，代入定语从句后为：I apologize for it.由此可见先行词在定语从句中作介词for的宾语，故答案为which。
答案：which
2.Almost every teenager will experience a period in their life________they aren't content with their parents.
解析：句意：几乎每个青少年都会经历一段对父母不满的时期。考查定语从句。先行词为a period，将先行词代入从句后为：They aren't content with their parents in the period.由此可见，先行词在定语从句中作时间状语，故答案为when。
答案：when
3.There are many new central leaders in China now，of________many once worked in the western provinces.
解析：句意：在当今中国很多新的中央领导中有很多曾在西部省份工作过。先行词为new central leaders，将先行词代入定语从句后为：Many of the new central leaders once worked in the western provinces.由此可见先行词在定语从句中作of的宾语且指“人”，故答案为whom。
答案：whom
4.He was educated at the local high school，after________he went on to Peking University.
解析：句意：他在当地的一所高中上的学，后来考上了北京大学。此题考查定语从句。先行词为前面的主句，将先行词代入定语从句后为：He went on to Peking University after he was educated at the local high school.由此可见先行词在定语从句中可与after构成时间状语从句，故答案为which。
答案：which
5.In most cases，college graduates don't mind what job they will do so long as it is one________they can earn money to support themselves.
解析：句意：在大多数情况下，大学毕业生不在乎他们将做什么工作，只要是一份能挣钱养活自己的工作就行。“________they can earn money to support themselves”为定语从句，先行词为one，即a job。将先行词代入定语从句后为：They can earn money to support themselves in_the_job.由此可见关系词在定语从句中作地点状语，故用where引导。
答案：where