Concept:In emphatic stress, the stressed word is highlighted because it corrects or contrasts with a different word in a question.
Explanation:The sentence stresses the word
PAY.
This means the sentence is the right reply to a question that used a different action in that same position.
Look for the option where the verb is not
pay but something else that can replace it.
Option B asks whether John must
repair the broken glass.
The natural answer to that question would be, “John must
PAY for the broken glass.”
So option B is the correct choice.
Answer:B. Must John repair the broken glass immediately?