Had Paul received four more votes in the last election, he ______ our chairman now.
【正确答案】 D
【答案解析】题中的条件句省略了if,并将助动词had提到主语前面,表示对过去情况的假设。而主句中的now提示是对现在情况的假设,应用“would/could/might+动词原形”,答案为D。