. The meeting was about to end and everyone was in a hurry to leave when Ted insisted_____

Some questions.

A．on asking

B．to ask

C．asking

D．that he had asked

计算机的发展经历了电子管计算机、晶体管计算机、集成电路计算机和（）计算机的四个发展阶段。

A.二极管

B.三极管

C.小型

D.大规模集成电路