下列引起意识障碍的疾病，其中哪项属颅内占位性病变

A．脑缺血

B．脑脓肿

C．脑出血

D．脑血栓形成

E．脑栓塞

Mr. Smith's _________. Let's wait for him here.  [ ]

A. hasn't arrived    

C. doesn't arrive

B. didn't arrive      

D. couldn't arrive