摘要：选 B. 考查非谓语形式.Smile, voice, expression, look 等用过去分词修饰.
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With his attention________on the shops along the roadside，he knocked an old man down while riding to school.
A concentrating B．concentrated C．to concentrate D．concentrates
答案 B
解析 考查词组，故选B项。
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______ to the victims in the mud-flow struck areas, you can contact the local charity organizations. 【吉林省东北师大附中2011届上学期高三第三次摸底考试】【非谓语动词】
A. Contributing B. To contribute C. Being contribute D. Contributed
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Studies show the electronic devices (people have made much use of) ______ music may be causing hearing losses. 【2010-2011学年安徽省高考自主命题仿真卷(一)】【非谓语动词】
A. enjoy B. enjoying C. to enjoy D. enjoyed
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