Fill in the blank with suitable modal from the options below:
"Who is she? She ______ be his sister".
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → must
So the complete sentence will be: "Who is she? She must be his sister."
- Must indicates a strong assumption or conclusion based on evidence or reasoning.
- Should implies advice or recommendation, which is not suitable in this context.
- Would suggests a hypothetical situation and is not appropriate for making an assumption.
- Need is not a modal that fits this context, as it conveys necessity rather than assumption.