it is! Thank you very much!A. What valuable adviceB. What a valuable adviceC. How good a

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(答案→)A. What valuable advice
B. What a valuable advice
C. How good a suggestion
D. How good advice
解析：考查感叹句。感叹句用what或how引导。感叹句的中心词是名词时，用what；是形容词或副词时，用how。Advice和suggestion都是名词，故用what引导，排除C、D；advice“建议”，不可数，排除B。故选A。