Tom is one of students in my class Yes . He usually prefers at home to playing

--- Tom is one of students in my class .
--- Yes . He usually prefers at home to playing outside .
A. the most hard-working , studying
B. more hard-working , to study
C. the most hard-working , to study
D. more hard-working , studying

(答案→)A. the most hard-working , studyingB. more hard-working , to studyC. the most hard-working , to studyD. more hard-working , studying解析：根据in my class可知，本句应该是最高级，根据one of +形容词的最高级+名词复数的用法，应该排除BD；根据prefer doing to doing“喜欢干某事，而不喜欢某事”，是固定用法。所以本题选A。

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