-When did you come back to Enshi?-____the aftemoon of May lst.A.On B.At C.In
He has been back .
一_________has your grandpa lived here? 一Since last year.
—What good weather! Let’s go boating on the lake. —__________.
--Could you tell me ___________? –I don't know. Maybe at 8:00pm.
The Olympic Games _____ in London in 2012. I hear it _____ in different countries every four years.