Combine the following pairs of sentences into one sentence using who, which or that which is suitable. One sentence is done for you as an example :
Example : (i) Registered letters/get special attention.
Letters, that are registered, get special attention.
(ii) The young man is the school captain. He was here a little while ago.
(iii) You borrowed a book from me. You have not returned it.
(iv) A car is parked in front of the bank. The car belongs to Mrs. Arora.
