Select the most appropriate degree of comparison to fill in the blank.
The underground railway network, ‘The Tube’ in London is said to be __________ transport in London.
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. the most expensive.
Context: The sentence is talking about the underground railway network compared to other transport options in London. It requires the superlative degree to show that it has the highest cost among all.
Meaning of the words:
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The most expensive: Superlative form meaning “costing the highest amount compared to all others.”
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Expensive: Positive degree, meaning “costly.”
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The expensive: Grammatically incorrect here; 'the' is not used before a positive degree in this way.
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More expensive: Comparative degree, meaning “costlier than another,” but here we are not comparing only two options — we’re saying it’s the costliest of all.
Correct word: The most expensive
Reason: Since the sentence is comparing one transport system to all others in London, the superlative degree is needed.
Final Sentence: The underground railway network, ‘The Tube’ in London is said to be the most expensive transport in London.
Hence the chosen option is correct.