1. The factory was built in a secret place, around ______ high mountains.
A. which was B. it was C. which were D. them were
【陷阱】容易誤選A或B，將A、B中的 which 和 it 誤認為是其后句子的主語。
【分析】最佳答案是C，around which were high mountains 是一個由"介詞+which"引出的非限制性定語從句，而在該從句中，主語是 high mountains，around which 是表語，所以句子謂語應用復數(shù)were，而不是用單數(shù) was.請做以下類例題目（答案均為C）：
（1） Yesterday we visited a modern hospital, around _______ some fruit shops.
A. which is B. it is C. which are D. them are
（2） The murder happened in an old building, beside ______ the city police station.
A. which are B. it is C. which is D. them are
（3） Next month we'll move to a new building, next to _______ a nice restaurant where we can have Chinese food.
A. which are B. it is C. which is D. them are

2. A man with a bleeding hand hurried in and asked, "Is there a hospital around ______ I can get some medicine for my wounded hand?"
A. that B. which C. where D. what
【陷阱】容易誤選 B，認為 around 是介詞，選 which 用以代替前面的名詞 hospital，在此用作介詞 around 的賓語。
【分析】最佳答案為C。以上語法分析并不算錯，但問題是，照此分析，此句的意思即為：有沒有這樣一個醫(yī)院，我在它的附近可以買藥治我的手傷？這樣的語境顯然有點不合情理，因為人們通常是在醫(yī)院里面治傷，而不是在醫(yī)院附近治傷。此題選 C 的理由是：句中的 around 不是介詞，而是副詞，意為"在附近"；其后的 where 引導定語從句用以修飾其前的地點名詞 hospital，句意為：附近有沒有一家醫(yī)院，我可以去治我的手傷？

3. _____ is known to everybody, the moon travels round the earth once every month.
A. It B. As C. That D. What
【陷阱】容易誤選 A，認為此處應填一個形式主語。
【分析】最佳答案是 B。as 引導的是一個非限制性定語從句。比較下面一題：
_______ is known to everybody that the moon travels round the earth once every month.
A. It B. As C. That D. What
此題答案選 A，it 為形式主語，真正的主語是后面的 that 從句。
再比較下面一組題，其中第（1）題選 B，第（2）題選 D：
（1） ______ is mentioned above, the number of the students in senior school is increasing.
A. Which B. As C. That D. It
（2） ______ is mentioned above that the number of the students in senior school is increasing.
A. Which B. As C. That D. It

4. David is such a good boy _______ all the teachers like.
A. that B. who C. as D. whom
【陷阱】此題容易誤選A，許多同學一看到題干中的such，再聯(lián)系到選項中的 that，便認為這是考查such ... that ...句式。況且，這樣理解意思也還通順。
【分析】最佳答案為C，不是A，因為在such ... that ... （如此......以至......）結構中，that 引導的是結果狀語從句，并且 that 在從句中不充當句子成分，若在上句填入 such ... that ...，句末的動詞 like 缺賓語。選C的理由如下：as 用作關系代詞，用以引導定語從句，修飾其前的名詞 boy，同時 as 在定語從句中用作動詞 like 的賓語，句意為"所有老師都喜歡的一位好男孩"。有的同學可能還會問，假若選A，能否將其后的 that 視為引導定語從句的關系代詞呢？不能，因為當先行詞受到 such 的修飾時，其后的定語從句應用關系代詞 as 來引導，而不用that.比較下面一題，答案為A，因為 like 后有自己的賓語 him：
David is such a good boy _______ all the teachers like him.
A. that B. who C. as D. whom
請再做以下試題（答案選D）：
It was not such a good dinner _______ she had promised us.
A. like B. that C. which D. as

5. The buses, most of _______ were already full, were surrounded by an angry crowd.
A. that B. it C. them D. which
【陷阱】容易誤選 C，用 them 代指 the buses.
【分析】最佳答案是D。most of which were already full 為非限制性定語從句，修飾 the buses.類似地，以下各題也選D：
（1） His house, for _______ he paid $10, 000, is now worth $50, 000.
A. that B. it C. them D. which
（2） Ashdown forest, through _______ we'll be driving, isn't a forest any longer.
A. that B. it C. them D. which
（3） This I did at nine o'clock, after _______ I sat reading the paper.
A. that B. it C. them D. which
類似地，以下各題選 whom，不選 them：
（4） George, with _______ I played tennis on Sundays, was a warm-hearted person.
A. that B. him C. them D. whom
（5） Her sons, both of ______ work abroad, will come back home this summer.
A. that B. who C. them D. whom
（6） I met the fruit-pickers, several of _______ were still university students.
A. that B. who C. them D. whom

6. He had thousands of students, many of ______ gained great success in their own field.
A. whom B. them C. which D. who
【陷阱】容易誤選 B，用 them 代指 students.
【分析】最佳答案是A，many of whom gained great success in their own field 為非限制性定語從句。假若在many of... 的前面加上連詞and，則選答案B。比較以下各題（答案均選A）：
（1） He asked a lot of questions, none of ______ was easy to answer.
A. which B. them C. what D. that
（2） He asked a lot of questions, and none of ______ was easy to answer.
A. them B. which C. what D. that
（3） He told me that he had two girl-friends, neither of _______ knew anything about the other.
A. whom B. them C. which D. who
（4） He told me that he had two girl-friends, and neither of _______ knew anything about the other.
A. them B. whom C. which D. who

7. He had a lot of friends, only a few of ______ invited to his wedding.
A. whom B. them C. which D. who
【陷阱】容易誤選 A，認為這是非限制性定語從句。
【分析】最佳答案是B，這不是非限制性定語從句，而是一個獨立主格結構，因為空格后的動詞 invited 并不是一個完整的謂語，而是一個過去分詞。當然，假若在 invited 前加上助動詞 were，則是一個非限制性定語從句，答案便應選A.比較：
（1） They put forward a lot of plans at the meeting, none of _______ carried out in their work.
A. which B. them C. what D. that
答案選B，none of them carried out in their work 是獨立主格結構，其中的 carried out 為過去分詞。
（2） They put forward a lot of plans at the meeting, none of _______ were carried out in their work.
A. which B. them C. what D. that
答案選A，none of them were carried out in their work 是非限制性定語從句，注意與上例比較句中多了一個助動詞were.
（3） They put forward a lot of plans at the meeting, but none of _______ were carried out in their work.
A. which B. them C. what D. that
答案選B，由于兩句之間增加了一個并列連詞but，使得該句成了一個并列句。

8. On Sundays there were a lot of children playing in the park, _______ parents seated together joking.
A. their B. whose C. which D. that
【陷阱】容易誤選B，認為這是非限制性定語從句。
【分析】最佳答案是A.與上面一題相似，their parents seated together joking 不是非限制性定語從句，而是一個獨立主格結構，因為空格后的動詞 seated 不是謂語，而是一個過去分詞，因為 seat 作動詞用時，是及物動詞。比較以下相似題：
（1） On Sundays there were a lot of children playing in the park, _______ parents were seated together joking.
A. their B. whose C. which D. that
選 parents were seated together joking 為非限制性定語從句，因為其后有完整的謂語 were seated.
（2） On Sundays there were a lot of children playing in the park, and _______ parents were seated together joking.
A. their B. whose C. which D. that
選A.因為句中有并列連詞and，整個句子為并列句。
（3） On Sundays there were a lot of children playing in the park, _______ parents sitting together joking.
A. their B. whose C. which D. that
選 parents sitting together joking 為獨立主格結構。
（4） On Sundays there were a lot of children playing in the park, _______ parents sat together joking.
A. their B. whose C. which D. that
選 parents sat together joking 為非限制性定語從句，因為句中有完整的謂語 sat.
（5） On Sundays there were a lot of children playing in the park, _______ parents were sitting together joking.
A. their B. whose C. which D. that
選 parents were sitting together joking 為非限制性定語從句，因為句中有完整的謂語 were sitting.

9. If the man is only interested in your looks, _____ just shows how shallow he is.
A. as B. which C. what D. that
【陷阱】容易誤選A或B，誤這是非限制性定語從句。
【分析】正確答案為D，注意逗號前是一個條件狀語從句，逗號后是該狀語從句的主句，that 在此代表前文所述的情況，用作主句的主語。類似地，下面幾道題也選 that，而不選 which：
（1） If you promise to go with us, _____ will be OK.
A. as B. which C. and it D. that
（2） If you want a double room, _____ will cost another ￡15.
A. as B. which C. what D. that
（3） Whether you go or not, _______ is quite all right with me.
A. that B. which C. and it D. so
（4） When I say two hours, _____ includes time for eating.
A. as B. which C. what D. that

10. She says that she'll never forget the time ________ she's spent working as a secretary in our company.
A. which B. when C. how D. where
【陷阱】容易誤選B，機械地認為時間名詞后必須用關系副詞when，地點名詞后用關系副詞 where.
【分析】正確答案為A.在時間名詞和地點名詞后是否用關系副詞要看它在定語從句中充當什么句子成分。一般說來，若用作主語或賓語，用關系代詞；若用作狀語，則用關系副詞。上面一題中的動詞 spent 缺賓語，故應用關系代詞 which或that.比較下面一題，由于空格后的句子不缺少主語或賓語，所以選關系副詞when：
She says that she'll never forget the time ________ she works as a secretary in our company.
A. which B. when C. how D. where
請再做一組試題（答案均選A）：
（1） Our company will move to a tall building _______ we bought last month.
A. which B. when C. how D. where
選A，which 在定語從句中用作動詞 bought 的賓語。
（2） Our company will move to a tall building _______ has just been complete.
A. which B. when C. how D. where
選A，which 在定語從句中用作主語。
（3） Our company will move to a tall building _______ we worked two years ago.
A. where B. when C. that D. which
選A，where 在定語從句中用作狀語。