-- ________.

--- Yes. Two minutes earlier, we could have caught the bus.

A．Miss

B．Missed it

C．Missing it

D．Having missed it

关于上皮组织的特征，正确的有：（）.

A.极性明显

B.神经末梢和毛细血管丰富

C.细胞间质少

D.不同部位的上皮功能有差异

E.形成许多特殊分化物