问题补充：
If my lawyer here last Saturday, he me from going.
A. had been; would have prevented
B. had been; would prevent
C. were; would prevent
D. were; would have prevented
答案：
(答案→)A. had been; would have prevented
B. had been; would prevent
C. were; would prevent
D. were; would have prevented
解析：虚拟语气，与过去事实相反用过去完成时态。
