Final answer:
The sentence that effectively concludes the paragraph is: 'Would Lady Evelyn's clumsiness, carefully masked for so long, at last be exposed?'
Step-by-step explanation:
The sentence that would effectively conclude the paragraph is: Would Lady Evelyn's clumsiness, carefully masked for so long, at last be exposed? This sentence effectively captures the theme of Lady Evelyn's nervousness and raises the question of whether her secret clumsiness will be revealed.
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