下列哪项不是乙型肝炎的主要传播途径（）

A.经血传播

B.母婴传播

C.日常生活接触传播

D.性接触传播

E.胃肠道传播

Construction of the gigantic office building in this city was for years intermittent.

A. stopping and starting at intervals
B. something that will happen soon
C. being watched with keen interest
D. anything that comes and goes