解析：本句中定語從句“his employees enjoy their work”不缺主賓表，先行詞為atmosphere，表示“氣氛，氛圍”。將“in＋先行詞atmosphere”還原回從句中成立，因此答案為where。
2．As the smallest child of his family，Alex is always longing for the time __when__he should be able to be independent.
解析：分析結構可知，此處是定語從句，先行詞為time。定語從句為空格后句子，缺少時間狀語，用when引導。句意：作為家里最小的孩子，亞歷克斯總是渴望他應該能獨立的時候。
3. Some experts think reading is the fundamental skill upon __which__ school education depends.
解析：本句為定語從句。引導詞在定語從句中位于介詞upon的后面作賓語，故用關系代詞且指代先行詞the fundamental skill，因此用which。
4．It is a truly delightful place, __which__ looks the same as it must have done 100 years ago with its winding streets and pretty cottages.
解析：此句是一個非限制性定語從句，先行詞是place，定語從句中缺主語，故用關系代詞which。句意：這真是一個宜人的地方，這里蜿蜒的小路和美麗的小村莊一定和100年前看起來是一模一樣的。
5．The books on the desk，__whose__covers are shiny，are prizes for us.
解析：此句是非限制性定語從句，先行詞為the books，________和covers之間存在所有關系，意為“書的封面”。句意：桌上的書是給我們的獎勵，那些書的封面閃閃發(fā)光。根據(jù)語境填whose。
6．He wrote many children's books，nearly half of __which__ were published in the 1990s.
解析：此句為非限制性定語從句，先行詞是children's books，定語從句中of缺少賓語，故填which。句意：他寫了許多兒童書籍，差不多一半左右是在20世紀90年代出版的。
7．Nowadays，school violence is a hot issue. I think this is a phenomenon，__which__calls for our great concern.
解析：句意：目前，學校暴力是個熱點問題。我認為這是一個需要我們極大的關注的現(xiàn)象。從句子結構分析可以看出，空白后面句子是一個非限制性定語從句，對前面句子進行補充說明。
8．The number of smokers，__as__is reported，has dropped by 17 percent in just one year.
解析：此句為as引導的非限制性定語從句。as意為“正如，正像”，在定語從句中可作主語、賓語或表語；as在這里代替整個主句的內(nèi)容；“as is reported”意為“正如被報道的那樣”。句意：正如被報道的那樣，煙民的數(shù)量在僅僅一年的時間就下降了17%。
9．Some passers－by witnessed the car accident __where__ five passengers were killed, a baby included.
解析：句意為：一些路人目睹了這場事故，其中有五位乘客喪生包括一個嬰兒。設空處引導定語從句，且關系詞在從句中作地點狀語，故用where引導。
10．“Spit－take” refers to an act __where__ someone spits liquid out of his or her mouth when he or she hears something funny or surprising.
解析：句意為：“笑噴”是指一種行為：某人在聽到有趣的或吃驚的事情后從嘴中噴出液體。設空處引導定語從句修飾act，引導詞在從句中作地點狀語，因此用where引導。
11．Cultural shock is a feeling __which/that__most travelers experience in a foreign country __where__ they find the culture is quite different from that of their own.
解析：句意為：文化沖擊是一種大多數(shù)游客在外國會經(jīng)歷的感覺，在那里他們會感覺外國的文化和自己的(文化)有很大的不同。分析句子成分可知，兩空均引導定語從句，第一空的先行詞為a feeling，且在從句中作experience的賓語，因此用which/that引導；第二空的先行詞為a foreign country，在從句中作地點狀語，故用where引導。
12．Tibet is such a place __as__ all the people across the world are dreaming of visiting.
解析：句意為：西藏是一個全世界所有的人都夢想游覽的地方。定語從句的先行詞為a place，其前有such修飾，引導詞應用關系代詞as。
13．Dad decided to build a small tool room with a lock, __where__ he would keep his best tools so my brother couldn't reach them.
解析：句意為：父親決定建一個帶鎖的小工具室，把他最好的工具放到里面，這樣我弟弟就不會拿到它們了。設空處引導定語從句；修飾先行詞a small tool room，并在從句中作地點狀語，故用where引導該定語從句。
14．In 2019, such important reform policies associated with the interests of the general public were introduced in China __as__ almost each person could benefit from in life.
解析：句意為：在2019年，關系到公眾利益的重要的改革政策被引進到中國，幾乎每一個人都能從中受益。先行詞policies前有such修飾，且引導詞作介詞from的賓語，因此用as引導。
15．We expect you to become someone of __whom__ we'll feel very proud in the future.
解析：句意為：我們希望你將來能成為我們會為之驕傲的人。feel proud of意為“為……感到自豪”，引導詞置于介詞of后作賓語，且先行詞為someone，指人，故填whom。
16．The movie Pompeii came out this February, __which__ many people think brings a touching love story to the audience.
解析：句意為：電影《龐貝末日》在今年二月上映，許多人認為它為觀眾帶來了一個令人感動的愛情故事。逗號后為非限制性定語從句，先行詞為the movie Pompeii，many people think為插入語，引導詞在從句中作主語，故填which。
17．Anyone __who__ upgrades their professional knowledge to a new level can apply for these courses.
解析：句意為：任何將專業(yè)知識更新到一個新水平的人都可以申請這些課程。設空處引導定語從句，修飾先行詞anyone，且在定語從句中作主語，一般不用that，故用who引導。
18．Then he waved his hand in the direction from __which__ the woman had called.
解析：句意為：接著他向傳來喊叫聲的那位女士的方向揮手。設空處引導定語從句，修飾先行詞direction，且在從句中作介詞from的賓語，故填which。
19．Will you think of those individuals__who/that__ have helped you get through difficulty when you are leading a comfortable life?
解析：句意為：在你生活舒適時你會想起那些幫你度過艱難時光的人嗎？該定語從句缺少主語，先行詞為指人的individuals，故填who或that。
20．On an autumn afternoon, we were sent to a farm __where__ we learnt to plant potatoes.
解析：句意為：在一個秋天的下午，我們被送到一個農(nóng)場，在那里我們學習了種植土豆。設空處引導定語從句，修飾先行詞a farm，且在從句中作地點狀語，故用where引導。
There was a time __1. when__ I was tired of learning English and disliked to speak English. And this is the reason __2. why__ my father forced me to join in a 30－day training in an English club before I went to senior high school. When I first came to the club, __3. where__ I met many strangers, I missed my parents very much. So I packed up my things and wanted to go home. Fortunately, my guide __4. whose__ teacher was Li Yang, communicated with me face to face, from __5. whom__ I gained some useful instructions. He also showed me a good partner, and we got along well with each other. Gradually I adapted to the life there. Every day I would like to talk to other teenagers and set down a series of activities __6. that/which__ we did. My father and the guide __7. who/that__ encouraged me to fall in love with English should be appreciated. Now I feel it interesting to learn English, into __8. which__ I put my entire energy. Every day I will read my words and passages aloud. In class I will join in English discussions. Before I go to sleep, I will recall my passages, through __9. which__ I can memorize a large number of new words. __10. As__ our English teacher says, “As long as we form the habit of learning English every day and have perseverance, we will conquer English sooner or later.”
1．Jim passed the driving test, it surprised everybody in the office.
答案與解析：it→which 由逗號可知，此處是一個非限制性定語從句，從句中缺少指代前面這個句子內(nèi)容的主語，所以要用which。it無連接作用，不引導定語從句。
2．It is such a big stone that nobody can lift.
答案與解析：that→as或在lift后加it 把該句看成so...that...結構，可以在lift后加it，把that引導的結果狀語從句補充完整。該句也可以看成一個定語從句，此時，先行詞stone前有such，所以定語從句的引導詞用as，as在從句中充當lift的賓語。故也可以把that改為as。
3．Which is mentioned above, our school still calls for many good teachers.
答案與解析：Which→As as和which引導非限制性定語從句且指代整句話時的區(qū)別。as和which在引導非限制性定語從句時，都可以指代整個一句話。 as從句位置比較靈活，置前、置中或置后都可以，而which只能放在主句后面。其次，如果從句意思是“正如……，正像……”時，就用as。如果從句意思是“這一點，這”時，就用which。總之，位置記住，意思分清。
4．Have you noticed that small house, its roof is red?
答案與解析：its→whose 由逗號可知，此處是一個非限制性定語從句。所以用whose代替its，its無連接作用，不引導定語從句。
5．Tomb－Sweeping Day is one of China's traditional festivals, in which people hold memorial activities in memory of the dead.
答案與解析：in→on “介詞＋關系代詞”的定語從句中的介詞由先行詞決定。on Tomb－Sweeping Day在清明節(jié)。
6．Believe it or not, I don't like the way which he spoke to me.
答案與解析：which→that/刪去which/which前加in 先行詞是way，定語從句中缺狀語時，定語從句引導詞可以是that/in which或者不加關系詞。
7．Henry Royce did not like his car, that ran badly and often broke down.
答案與解析：that→which 逗號后是非限制性定語從句，引導詞在從句中作主語，指代先行詞car，故用which。that不能引導非限制性定語從句。
8．Are you facing a situation where looks impossible to fix?
答案與解析：where→which/that situation后是一個定語從句，引導詞在從句中作主語，故用which/that。
9．She is a very nice girl whom has a dream of becoming an actress.
答案與解析：whom→who/that girl后是定語從句，引導詞在從句中作主語，故應該用who/that。whom是賓格，只能作賓語。
10．The dishes what I cooked were Mom's favorite.
答案與解析：what→which/that或刪去what dishes后是定語從句，引導詞在從句中作賓語，故用which/that或刪去what。what不引導定語從句。
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