–How are you feeling about the story of a young lady’s being taken away by a UFO last week?

--We are very frightened—I ____bad dreams for weeks.

A．have been dreaming

B．dreamt

C．was dreaming

D．have dreamed

为了保证装置的动作可靠，所以在引向保护装置的电压互感器电源都（）保险器。