Why didn’t you ask for help, trying to do it on your own?A. other thanB. less thanC. mor

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A. other than
B. less than
C. more than
(答案→)D. rather than
解析：短语辨析。   A. 不同于  B. 小于 C. 多于；超出   D. 宁愿；不是。句意：你为什么不请求帮助，而是靠自己做。故选D。