— Alvin, are you coming with us?

—  I'd love to, but something unexpected _____. [ ]

A. has come up    

B. was coming up    

C. had come up

D. would come up

我国在()保险中，实施无赔款保费优待。

A.飞机

B.家庭财产

C.船舶

D.机动车辆