单选题 When required by their parents to eat cabbage and other green vegetables, many children only do so reluctantly.

【正确答案】 C

【答案解析】[解析] reluctantly意为“不情愿的”，initiatively意为“主动地”，与划线词的意思相反，impatiently意为“不耐烦地”，unwillingly意为“不情愿地”，unlikely意为“不可能地”。故正确选项为C。