2 vòi nước cùng chảy vào bể không có nước thì sau 4h48p thì đầy bể. Nếu chảy riêng để đầy bể thì vòi I chảy nhanh hơn vòi II là 4h. tính thời gian chảy riêng để đầy bể của mỗi vòi

1.      This is the place _________ I met my wife.

A.  what             B. where        C. which        D. that

2.      Simon is the man _________ Mary loves.

A.  who                          B. which        C. whom        D. A&C

3.      My wife, _________ is a doctor, works at Community Hospital.

A.  who                          B. which        C. whom        D. that

4.      Only one of the people _________ work in the company is qualified.

A.  what             B. which        C. who                        D. where

5.      She is the one _________ I told you about.

A.  what             B. which        C. whose        D. who

6.      Those _________ had studied hard passed their exams.

A.  what             B. which        C. who                        D. whose

7.      The magazine _________ you lent me is interesting.

A.  what             B. which        C. whom        D. whose

8.      The man _________ is resting is very tired.

A.  what             B. which        C. whom        D. who

9.      The boy _________ sat next to you is my friend.

A.  who                          B. which        C. whom        D. whose

10. We are using books _________ were printed last year.

A.  what             B. who                        C. which        D. whose

11. The painting_________Ms. Wallace bought was very expensive. 

A.  whom           B. whose        C. which        D. where

12. The homeless people_____story appeared in the paper last week have now found a place to live. 

A.  who             B. whom        C. that                         D. whose

13. __________ is your favourite sport, swimming or running. 

A.  What            B. Which       C. Whom       D. Whose

14. Were the Wright brothers the ones __________built the first aeroplane? 

A.  which           B. whom        C. whose        D. that

15. I don't like stories________ have unhappy endings.

A.  where           B. which        C. they                       D. who

16. The periodic table contains all the elements, ________ has a particular atomic weight and atomic number.

A.  which of each B. each of which C. which each D. each

17. Ansel Adams was a landscape photographer ________ photographs of the western United States show nature on a grand scale.

A.  whose           B. of whom  C. of his         D. his

18.Jan didn't check she had enough petrol before she left, ________ was careless of her.

23. He was killed by a man ________  friends we know.

A.                whose             B. which        C. whom        D. that

24. He spoke to the messengers with ________  you were leaving.

A.                which             B. whom        C. whose        D. that

25. We captured a town ________  is in Spain.

A.                whom             B. where        C. which        D. it

26. The farmers ________  we saw were in the field.

A.                whose             B. which        C. they                        D. whom

27. The women ________  I gave the money were glad.

A.                to whom         B. to that        C. for whom D. for that

28. I know a boy ________  name is John.

        A. who                B. whose            C. whom            D. that

29. The man ________  you sent to the general has reported the victory.

        A. whose            B. which             C. whom            D. he

30. I saw those slaves ________  had been led to the city.

        A. whose            B. which             C. whom            D. who

31. The people ________  courage you praised are now citizens.

        A. whose            B. which             C. whom            D. that

32. You folks ________  live in farmhouses do not like the life of the city.

        A. whose            B. who                 C. they                D. which

33. Those towns ________  you were looking at in Gaul are small.

        A. who                B. where             C. which             D. whom

34. In Helvetia I have seen a large city ________  many people live.

A. at which          B. which        C. on which   D. in which

35.He ________  is not my friend is my enemy.

        A. who                B. which             C. whom             D. A&B

36.I sent my friend the books ________  I had written.

        A. who                B. which             C. whom            D. what

37.Behind the farmhouse there was a large garden, ______ the farmer and his sons were working.

A. for which        B. which        C. in which    D. that

38. Did you see the men ________ I gave the money?

        A. to whom        B. which             C. from whom D. to that

39. She sends me the book________ she________  two years ago. 

A.    whom / writes             B. whose /wrote  

        C. which/ writes                           D. which / wrote

40. The man ________ spoke to John is my brother.

A.    whom             B. who                        C. whose        D. which

41. I must thank the man from _____ I got the present.

A.    who                B. whom        C. that             D. which

42. It is a car ______ I bought last year.

A.    whom             B. who             C. which       D. whose

43. He is the man _______ son is a doctor 

A.    whom             B. which        C. who            D. whose

44. The woman _______next door is a famous singer. 

A.    lives                B. who live    C. living         D. that living