题目

Emma looked after her pet dog________ of all her friends. A．careful                 B．most careful C．more carefully        D．the most carefully 答案：D　点拨：本题用语法判定法解题。句意：在她的所有朋友中，埃玛照看她的宠物狗是最仔细的。根据句意应该用最高级，排除A、C；look after为动词短语，应用副词修饰。故选D。

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