Question

Every possible means_____ been tried，and we find only______ this means can we do it well． A．

Every possible means_____ been tried，and we find only______ this means can we do it well． A．have，in B．have，by C．has，in D．has，by

Answer 1

D

其余几项均容易被误选。这里主要涉及名词means（方式，方法，手段）的用法与搭配：means 单复同形，every means意思是“每一个方法”故谓语动词应为单数；“通过某种方式”，介词用by固定搭配。故选项中只有D正确。