कोष्ठक में दिए गए खंड को सही ढंग से प्रतिस्थापित करने वाले विकल्प का चयन करें। यदि वाक्य सही है, तो 'No substitution required' चुनें। The detective (had been solved the murder mystery) within a week.

Select the option that improves the underlined part of the sentence: The boy told his teacher to explain the passage.

Select the option that improves the underlined part of the sentence: We demonstrated to them how we were prepared the artistic patterns.