His fahter _____in New York last Friday. But he _____here now.

A．is , was

B．was, is

C．were, is

D．were, was

下列疾病属于骨关节肿瘤的是（）

A.骨囊肿

B.动脉瘤样骨囊肿

C.软骨骨瘤

D.关节内骨软骨瘤病

E.腱鞘囊肿