Sentence improvement – participate clause and sequence of past actions: Improve the second clause so the sentence reads, 'Hoping not to be disturbed, I sat down in my easy chair to read the book I had won as a prize,' correctly showing earlier past action with past perfect.

Given data

• Original: 'hoping not to be disturbed, I sat down in my easy chair to read the book. I won as a prize.'
• Target: connect the second sentence naturally to the noun 'book' and show that winning happened before sitting down.

Concept/Approach
Use a relative clause to modify 'the book' and the past perfect to mark an action earlier than another past action. Past perfect ('had won') precedes simple past ('sat down').

Step-by-step improvement
1) Attach a relative clause: '…the book that/which I … as a prize.'2) Choose past perfect to show prior action: 'had won' → '…the book I had won as a prize.'3) Full improved sentence: 'Hoping not to be disturbed, I sat down in my easy chair to read the book I had won as a prize.'

Option analysis
'I have won as prize' → wrong tense and missing article; 'I had to win as a prize' changes the meaning; 'No improvement' leaves tense sequence faulty.

Final Answer
I had won as a prize