．From his voice on the phone I know everything is going under way.
A. satisfactory
B. satisfying
C. satisfied
D. satisfaction
网友回答
A. satisfactory
B. satisfying
(答案→)C. satisfied
D. satisfaction
解析：声音voice能体现人的情感。satisfied意为“感到满意”，符合题意。satisfying意为“令人感到满意”，多说明某物或某事。