32. who

33. which

34. whom

35. which

36. who

37. whose

38. whom

39. where

40. whom

41. whom

42. who

43. who

                                          Mong bạn thấy hữu ích ^^

30. A

31. B

32. The girl who is sitting by Jack is Mary.

33. Can you understand the question which he asked you last time?

34. Is that girl whom we saw on TV last night?

35. The farm which we visited last Sunday produces milk.

36. At last he married the girl whom he loved.

37. The man whom we played with his daughter everyday is an engineer.

38. He didn't receive the letter which I sent him last Januay.

39. He often tells me about his village where he was born.

40. My sister, whom you met at my birthday party, wants to speak to you.

41. The children like the funny stories which their grandmother tells every evening.

42. Jack London, who wrote "Iron Heel", is a famous American writer.

43. The boy who sitting next to Mary is Jack.

- $Answered$ $by$ $thieukhue$ -