答案：D

not to mention＝更不用说，此外还有：not to say＝虽不能说，即使不能说。如：He can speak French and Japanese, not to mention English. 

　他会法语和日语，更不用说英语了。

David is handsome and smart, not to mention being a good athlete. 

　戴维漂亮精明，而且还是个优秀的运动员。

It is warm, not to say hot. 　天气虽说不上热，但也够暖了。

He was impolite, not to say rude. 　他即使不是粗鲁，至少也是没有礼貌。

【标签】词组词义辨析