11) that car belongs to Dr. Clark. Its engine is very good.
=> that car whose engine is very good belongs to dr. Clark

12) You sent me a present. Thank you very much for it.
=> thank you very much for the present which you sent me

13)This is MRS.Jones. her son won the championship last year.
=> this is mrs jones whose son won the championship last year

14) Rod Lee has won an Oscar. I know his sister.
=> rod lee whose sister I know has won an oscar

15) Is this style of hair? Your wife wants to have it.
=> is this style of hair which Your wife wants to have

16) A man answered the phone. He sad Tom was out
=> a man who answered the phone said Tom was out.
17) 7.05 is the time. My plane arrives then
=> 7.05 is the time when My plane arrives then

18) Max is not home yet. That worries me
=>max is not home yet, which worried me

19) Do you know the building? The windows of the building are painted green
=> Do you know the building whose The windows are painted green

20) Last week i went to see the house. I used to live in it
=>Last week i went to see the house where I used to live in it

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