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<文意選填>第31至40題為題組
Dimples are small folds or indentations on the cheeks of one’s face. Generally， they appear on both cheeks; a single dimple on one cheek is a relatively ___31___ phenomenon.
(A) flaw
(B) exhibit
(C) chubby
(D) attractiveness
(E) fade
(F) rare
(G) range
(H) transfer
(I) natural
(J) presence