1. John didn't study for the exam. That was a very stupid thing to do.

John didn't study for the exam which was a very stupid thing to do.

2. We flew to New York in the Concorde. It is the fastest passenger plane in the world.

............We flew to New York in the Concorde which is the fastest passenger plane in the world............

3. Smallpox has disappeared. It once killed thousand of people every year.

........Smallpox which once killed thousand of people every year has disappeared.......

4. I passed him a large glass of whisky. He drank it immediately.

...I passed him a large glass of whisky who drank it immediately.

5. The small man was Lisa's husband. Nobody recognised him.

...The small man was Lisa's husband whom Nobody recognised....

6. This is Mr. Jones. He writes poetry.

....................This is Mr. Jones who writes poetry..........................

7. This is Felicity. You met her sister last week.

...........This is Felicity whom You met last week...................

8. He swam across the English Channel. It is hard to believe that.

..He swam across the English Channel which is hard to believe that...

9. Her wife died last year. Her name was Angela.

.............Her wife died last year whose name was Angela............

10. Borges was a wonderful writer. He never won the Nobel Prize.

.....Borges who never won the Nobel Prize was a wonderful writer...

11.A man from our village was on TV last night. I teach his children.

........I teach the children of the man from our village who was on TV last night....

12.Charlie Chaplin died in 1977. His films amused millions.

...........Charlie Chaplin, whose films amused millions, died in 1977.......

13.My parents send their best wishes. You met them last month.

........My parents, whom you met last month, send their best wishes......

14.The parcel contained a bomb. They had opened it carefully.

...........They had opened the parcel which contained a bomb carefully....

15.The match will be shown on TV tonight. They filmed it this afternoon.

......The match which is filmed this afternoon will be shown on TV tonight......

16.His sisters are identical twins. I saw them last

..............His sisters whom I saw last are identical twins..........

90. John didn't study for the exam, which was a very stupid thing to do.

91. We flew to New York in the Concorde, which is the fastest passenger plane in the world.

92. Smallpox which once killed thousand of people every year has disappeared.
93. I passed him a large glass of whisky which he drank immediately.
94. That small man whom nobody recognized was Lisa's husband.

95. This is Mr. Jones, who writes poetry.

96. This is Felicity, whose sister you met last week.

97. He swam across the English Channel, which is hard to believe.

98. Her wife whose name was Angela died last year.

99. Borges who never won the Nobel Prize was a wonderful writer.

100. A man from our village whose children I teach was in TV last night. 

101. Charlie Chaplin, whose films amused millions, died in 1977.

102. My parents whom you met last month send their best wishes.

103. The parcel which they had opened carefully contained a bomb.

104. The match which they filmed this afternoon will be shown on TV tonight.

105. His sisters whom I saw them last... are identical twins.