This exercise practises possessive phrases. These are noun phrases which are compounds with more than one noun, or which include other phrases, such as prepositional phrases and relative clauses, and which are then turned into possessive phrases with 's attached to the final word in the phrase. Basically, the whole phrase is treated as a single noun, with the 's attached to it at the end. These phrases are generally avoided in more formal speech and writing, and are mostly used in colloquial speech. Look at the examples below. Then read the sentences and put the's on the correct word, and write it in the box at the end of the sentence, e.g. for "the man in the car's money", write .

The car belongs to John and Mary. -> It's John and Mary's car.
This money belongs to the man in the car. -> It's the man in the car's money.
I didn't recognise the voice of the man who answered the telephone. -> I didn't recognise the man who answered the telephone's voice.