I'm very sorry to keep you _          so long. I have something important to do.           [ ]

A. wait                  

B. waiting                

C. waiting for             

D. waited

病人肢体软弱无力，行动不灵而无痛者，属（）

A.痿病

B.痹病

C.痫病

D.虚风内动

E.小儿惊风