单选题 He was ______ only by his wish to help me, and expected nothing in return.
【正确答案】 D
【答案解析】解析:motivate vt.做……的动机是,引起,驱使;激励(如:Kindness motivated the action.The murder was motivated by hatred.)。activate vt.使活动起来,使开始起作用。encourage vt.鼓励,支持,助长。inspire vt.鼓舞,激起;给……以灵感。