问题补充：
Mary heard somebody call her, so she turned to see who it was..
A. off
B. out
C. up
D. around
答案：
A. off
B. out
C. up
(答案→)D. around
解析：词义辨析。turn off意为“关掉；关上”， turn out “生产”， turn up 为“把（声音）调大一点”， turn around 指“转身”。由句意“玛丽听到有人叫她，就转身看一下是谁（在叫她）。”可知，用turn around，故选D。
