In case it thunders, we’d better _____ the electricity at once and turn off the TV.

At the opening ceremony, the chairman ______ a speech to welcome the guests from more than twenty centuries.

as a strict but good captain,_________ who, usually, took care of the sailors on his ship

I cut my finger.—You should ________.

I hate it when she calls me at work—I’m always too busy to _____ a conversation with her.