问题补充:
Maybe if I science,and not literature then,I would be able to give you more help.(·北京)
A. studied
B. would study
C. had studied
D. was studying
答案:
A. studied
B. would study
(答案→)C. had studied
D. was studying
解析:考查错综时间的虚拟语气。主句用的是would be able to...表示对现在情况的假设,但由if从句中的then可知,从句表示对过去情况的虚拟,故用had studied。