You are so dependent that I'm afraid you can't adjust yourself to alone for a time.
A. leave
B. leaving
C. be left
D. being left
网友回答
A. leave
B. leaving
C. be left
(答案→)D. being left
解析：句意：你是这么依赖以至于我害怕你不能适应自己被单独留下一段时间。Adjust oneself to doing“适应…”,而且yourself和leave alone是被动关系，用动名词的被动。选D。