______ both of us failed to pass the driving test, ______ we learned much about driving. [ ]

A. Unless / and

B. Because / 不填

C. Though / but

D. Although / 不填

金元时期，对中医学理论的发展有突出贡献的医家是：（）

A、张仲景

B、张从正

C、刘完素

D、李杲

E、朱丹溪