The study showed a deep fear among the old people of to the care of strangers.A. abandone

问题补充：

The study showed a deep fear among the old people of to the care of strangers.

A. abandoned

B. to be abandoned

C. being abandoned

D. abandoning

答案：

A. abandoned

B. to be abandoned

(答案→)C. being abandoned

D. abandoning

解析：考查动名词用法。本句中介词of后面要使用动名词doing的形式。句意：这项研究显示，在老人中有一种恐惧，担心被留给陌生人来照顾。个句意可知old people与abandon之间存在着被动的关系，故使用动名词的被动语态的形式。故C正确。