第15题: [单项选择]Mary had always refused to cooperate with others because she believed that she could do better______ . A. single-handed B. than anybody C. in person D. all her own 参考答案:A 答案解析:single-handed:adv. 独立地;如:He finished the job single-handed. in person:亲自;直接地,如:The President heard t