Complete the sentence with the neutral present-simple be-passive form of the verb in brackets, not a perfect or get-passive: Technicians are responsible for the repair. Provided the network ___ by six, the remote seminar will begin on schedule. (restore)

Explication

Is restored supplies the explicitly requested neutral present-simple be-passive for the technicians' work. Has been restored adds perfect aspect, and gets restored uses a change-of-state get-passive, so neither matches the specified construction.