—Did you visit the museum last week ?

—No, we ___, but we spent too much time shopping.

A．could have

B．could

C．must have

D．must

西安碑林博物馆中展出的石刻六骏原置于唐代哪个帝陵（）

A.乾陵

B.昭陵

C.桥陵

D.献陵