This book is for a six-year-old child to read.A. enough easyB. enough easilyC. easy enough

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A. enough easy
B. enough easily
(答案→)C. easy enough
D. easily enough
解析：根据本空放在is后面作表语，应该用easy，故排除BD；又根据enough修饰形容词时应放在其后的用法，所以本题选C。