Final answer:
The correct pronouns to complete the sentences are 'whose', 'what', 'when', and 'wherever'. These words are selected based on their appropriate use as relative pronouns and adverbs within the context of each sentence.
Step-by-step explanation:
The student's question revolves around choosing the appropriate relative pronouns to complete sentences with clear meaning. This is a common exercise in English grammar studies to enhance understanding of correct word usage in different contexts.
- There's a lucky person in this hall whose lottery ticket has just won them 7,000,000 Birr.
- Why don't you tell the police what you told me yesterday?
- The film is set in the period when the divide between rich and poor was much greater than it is now.
- You can put the photo wherever you think it looks best.
These sentences have been correctly completed with 'whose', 'what', 'when', and 'wherever', each serving as the appropriate relative pronoun or adverb to provide clarity to the phrase.