【正文】 用where時(shí)先行詞是表示地點(diǎn)的名詞，而用why時(shí)它的先行詞只可能是reason，使用時(shí)應(yīng)注意以下幾點(diǎn)：　　1） 關(guān)系代詞的選擇主要是看先行詞在從句中所作的成分　　This is the city where I was born.　　This is the city （which/that） he has visited　　I don‘t know the reason why she is late.　　That is the reason （which/that） everybody knows　　Do you still remember the day when he arrived？　　Do you still remember the day （that/which） we spent together？　　2） 關(guān)系副詞when，where， why可由“介詞+which”的結(jié)構(gòu)來替代　　Is this the reason for which they came？　　He left the day on which I came.　　注意：how 不能用來引導(dǎo)定語從句　　This is the way how he did it.　D） As 作關(guān)系代詞的用法　　與the same， such連用　　This is the same book as I read last week.　　Such books as I have read are classical works.　　定語從句練習(xí)：　　1. The book ______ is yellow was given to me by Mr. Li.　　A）it‘s cover C） whose cover　　B） its cover D） the cover of that　　2. Who was the greyhaired old woman ______ at yesterday‘s meeting？　　A）we saw herC） we saw　　B） we saw whom D） she was seen　　3. He makes good use of the time ______ he can spare.　　A）when C） that　　B） in that D） in which　　4. I don‘t know the room ______　　A）where our headmaster lives in　　B） our headmaster lives in　　C）in that our headmaster lives　　D）in which does our headmaster live　　5. This is the least interesting book ______　　A）which I have ever read C） what I have ever read　　B） I have ever read D） which I have ever read　　6. You must do everything _____ I have told you to.　　A）which B） that C） when D） how　　7. Has all _____ can be done _____？　　A）what/done C） that/been done　　B） that/be done D） what/ already done　　8. Oct. 1， 1949 is the day _____ even a small child can well remember.　　A）when B） that C） what D） why　　9. That was the room ______ they pretended to be working hard.　　A）which B） in that C） in which D） that　　10.amp。nbsThis is the reason ______ I love to read the story.　　A）Why B） because C） when D） since　　11. She had three sons， all ______ became doctors.　　A）of which B） which C） of whom D） who　　12. Have you bought the same dictionary ______ I referred to yesterday？　　A）that B） which C） what D） as 13. The doctor ______ stepped in.　　A）Della was waiting for him　　B） whom Della was waiting　　C）Della was waiting for　　D）who Della was waiting　　14. I want to buy such a dictionary _____ you bought last week.　　A）that B） what C） likeD） as　　15. This is the TV station ______ we visited last year.　　A）Where B） that C） to which D） in which　　16. Do you still remember the days ______ we spent together in Australia？　　A）when B） during which C） which D） on which　　17. Have you ever asked him the reason _____ may explain his absence？　　A）why B） when C） that D） what　　18. Mary is good at English and mathematics， ______ we all know very well in our school.　　A）that B） what C） /D） as　　19. Let‘s go and visit Mr. Brown， ______ you know visited us last year.　　A）that B） whoC） whom D） whose　　20. She is pleased with ______ you have given her and ______ you have told her.　　A）that/that B） what/that C） what/all what D） all/what　　21. I， who ____ your friend， will try my best to help you.　　A）be B） am C） are D） is22. I‘ll remember the days and nights ______ we were together in Australia.　　A）when B） that C） at which D） at when　　23. The world ______ is made up of matter.A）in that we live C） on which we live　　B） where we live in D） we live in　　24. This is the most difficult book ______.　　A）what I have ever read C） which I have ever read　　B） I have ever read it D） that I have ever read　　25. There es a time in every man‘s life ______.　　A）then he has to think C） when he has to think　　B） therefore he has to think D） about which he has to think　　26. He spoke confidently， _____ impressed me most.　　A） so that B） thatC） it D） which　　27. He took down a square green bottle， _____ he poured into a dish.　　A） its contentB） which contentC） the content of which D） the content of that　　28. It wasn‘t such a good dinner _____ she had promised us.　　A） that B） which C） as D） what　　29. All _____ is a continuous supply of the basic necessities of life.　　A） what is neededB） for our needs C） the thing neededD） that is needed　　30. The goals _____ he had fought all his life no longer seemed important to him.　　A） after which B） for which C） with which D） at which　　31. The time is not far away _____ modern munications will bee widespread in China‘s vast countryside.　　A） when B） asC） until D） before　　32. The residents， _____ had been damaged by the flood， were given help by the Red CrossA） all whose homes B） all their homes　　C） all of whose homes D） all of their homes　　33. Language is a city， to the building of _____ every human being brought a stone.　　A） whichB） thatC） it D） this　　34. You will want two trees about ten feet apart， from _____ to suspend your tent.　　A） there B） them C） whereD） which　　35. The mere fact _____ most people believe nuclear war would be madness does not mean that it will not occur.　　A） what B） which C） that D） why　　36. The course normally attracts 20 students per year， _____ up to half will be from overseas.　　A） of whom B） for whom C） with which D） in which　　37. I‘ve never been to Beijing， but it’s the place _____.　　A） where I‘d like to visit B） I most want to visit　　C） in which I‘d like to visit D） that I want to visit it most　　38. We grow all our own fruit and vegetables， _____ saves money，