第22题: [单项选择]Our research has not shown us anything so far, so there is little ______ to continue with it. A. impatience B. incentive C. impulse D. initiative 参考答案:B 答案解析:(incentive刺激,鼓励,动机)。句意为:迄今为止,我们的研究还没有得出什么结果,因此缺乏继续研究的动力。A.impatience不耐烦,急躁;C.impulse冲动;D.initiative主