问题
选择题
You should keep working hard ____ you have passed the exam.
A．since
B．because
C．so
D．even though
答案
答案：D
题目分析：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.
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