【题目】If he ____ the book before, Jack would be able to tell us something about the story now.
A. read B. would read
C. was reading D. had read
在线课程【答案】D
【解析】
试题分析：考查虚拟语气。本题考查错综条件虚拟语气，从句与过去事实相反，故用had + v-ed，主句与现在事实相反，故用would + v-原形。句意：如果杰克之前读过这本书的话，现在他就能够给我们讲一些故事了。故D正确。