问题补充：
If you at school, you a college student now.
A. had studied hard; would have been
B. should have studied hard; should have been
C. had studied hard; would be
D. would study hard; must have been
答案：
A. had studied hard; would have been
B. should have studied hard; should have been
(答案→)C. had studied hard; would be
D. would study hard; must have been
解析：可联系答.案.网客服索取。
