51. The bed on which I sleep has no mattress.
52. There wasn't any directory in the telephone box from which I was phoning.
53. The chair on which I was sitting suddenly collapsed.
54. Mr. Smith whom I had come specially to see said he was too busy to speak to me.
55. I saw several houses, most of which were quite unsuitable.
56. The office to which Graham took us was filled with books.
57. Mr.Mark, whose farm the steams flow across , is unhappy about the plans for the new dam.
58. They picked up five boat-loads of refugees, some of which had been at sea for several months.
59. The people to whom he was speaking didn't know French.
Câu rút gọn sử dụng mệnh đề quan hệ:
whom - chỉ người
which: chỉ vật
whose + danh từ: chỉ vật sở hữu của chủ thể đó
