39.( )the money he saved,he went on with his education

明显是D。你将原句简单化：He went on with his education with the money he saved。On 和 in 明显不对,希望你还不至于在这两个之间徘徊。 By是通过某种手段,e。g He got the money by deceiving。多读多记是解决这种问题的最好办法,切忌用中文思维将英文翻译过来。