浸渍器上盖的管路中安有（），以检测浸渍器内压力是否为大气压，当浸渍器内压力为大气压时，压力开关发出信号，允许其上、下盖打开；反之，当浸渍器内压力大于大气压时，压力开关发出信号，禁止其上、下盖打开。

— It rained heavily yesterday. Did you get wet ?

— Quite lucky, ______ got on the train when it poured down.

A．no sooner had I

B．I have no sooner

C．hardly had I

D．scarcely I had