现已少用六甲溴铵单独实施控制性降压，原因不包括（）

A.单用六甲溴铵难获满意降压效果

B.可能会出现难以控制的低血压

C.作用时间长，血压难以调节控制

D.副作用及不良反应多

E.特别不适用于老年人和血管硬化病人

________ got on the train when it began to move.

A．No sooner had I

B．I had no sooner

C．Hardly had I

D．I hardly had