5.I was sitting on a chair. It suddenly collapsed.The chair .............................................. 6.Mr Smith said he was too busy to speak to me. I had come specially to seehim.Mr Smith ............................................... 7.I saw several houses. Most of them were quite unsuitable.I ...................................................... 8.Graham took us to his office. It was filled with books.The office ............................................... 9.Mr Marks is unhappy about the plans for the new dam. The stream flows across his farm.Mr Marks ............................................... 10.They picked up five boat-loads of refugees. Some of them had been at sea for several months.They ................................................... 11. Tom came to the party in patched jeans. This surprised the other guests.Most of the other guests were wearing evening dress.Tom .................................................... 12.The people didn't know French. He was speaking to these people.The people ............................................... 13. Mr Jones was very generous about overtime payments. I was working forhim.Mr Jones ................................................ 14. The Roman coins are now on display in the National Museum. A local farmer came across them in a field. The Roman coins ..........................................

5.I was sitting on a chair. It suddenly collapsed.

⇒I was sitting in the chair which suddenly collapsed.

6.Mr Smith said he was too busy to speak to me. I had come specially to seehim.

⇒Mr. Smith, who I had come specially to see, said he too busy to speak to me.

7. I saw several houses. Most of them were quite unsuitable.
--> I saw several houses, most of which were quite unsuitable.

8.Graham took us to his office. It was filled with books.

⇒ the office which Graham took us to was filled with books.

9.Mr Marks is unhappy about the plans for the new dam. The stream flows across his farm.

⇒Mr. Marks is unhappy about the plans for the new dam which flows across his farm.

10.They picked up five boat-loads of refugees. Some of them had been at sea for several months.

⇒They picked up five boat-loads of refugees some of which had been at sea for several months.

11. Tom came to the party in patched jeans. This surprised the other guests.Most of the other guests were wearing evening dress.

⇒Tom came to the party in patched jeans which surprised the other guests. Most of the other guests were wearing evening dress.

12.The people didn't know French. He was speaking to these people

⇒People whom he was speaking to didn't know French

13. Mr Jones was very generous about overtime payments. I was working forhim

⇒Mr Jones whom I was looking for was very generous about overtime payments.

14. The Roman coins are now on display in the National Museum. A local farmer came across them in a field.

⇒The Roman coins which a local farmer came across in the field are now on display in the Narional Museum