As there was no one she could ， she felt very helpless.
A. turn to
B. turn on
C. turn off
D. turn over
网友回答
(答案→)A. turn to
B. turn on
C. turn off
D. turn over
解析：考查动词短语辨析。turn to意为“求助于”，此处she could turn to为定语从句，引导从句的关系代词whom省略了。turn on“打开”；turn off“关掉”；turn over“翻转”。