With that information , I sought out Douglas Smith, director of the Center for Brain Injur

With that information , I sought out Douglas Smith, director of the Center for Brain Injury and Repair at the University of Pennsylvania.
A. in hand
B. in the hand
C. in hands
D. in the hands

(答案→)A. in handB. in the handC. in handsD. in the hands解析：考查介词短语的区别。A inhand adv.在手头, 在进行中, 掌握住而；B inthehand是adj表示在手中；有in one's hands表示“受某人的管理，保存或控制的”；没有C、D结构，排除；句意：由于有信息在手头，我找到了在宾夕法尼亚大学的脑损伤与修复中心的主任---道格拉斯史密斯。故A正确。

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