You should keep working hard you have passed the exam. A. since B. because C. so D. even

问题补充：

You should keep working hard you have passed the exam.

A. since

B. because

C. so

D. even though

答案：

A. since

B. because

C. so

(答案→)D. even though

解析：句意：尽管你已经通过了考试，你还应该继续努力学习。A. since 因为，既然；B. because因为； C. so 所以；D. even thoug尽管，虽然。根据句意故选D.