Ithinkitmusthaverained,__________?

Jerry knows nothing about the plan _____ his friends told him.

I think it must have rained,__________?

——Whoknockedatthedoor?

——I’venoidea.Ijustpretendednobodywasathome,soIdidn'taskwho_____was.

— The manager of the factory wants to improve production a great deal, but he doesn’t spend much on technology.

— I am afraid he won ’t realize his dream. You know ________.