---Where___?

—I got caught in the heavy traffic, or I ___ here earlier.                                        

A．did you go; had arrived

B．are you; was

C．were you; would come

D．have you been ; would have been

超声对下列哪些组织的诊断作用有限（）

A.实质性脏器

B.软组织

C.含气组织

D.骨骼组织

E.含液体脏器