To succeed in doing an experiment,________.

Jim, could you tell me if you _____________ our party tomorrow?—I think I will if I _____________ free.

Zhang Yimou is not in China. He has gone .

My deskmate always __________ a rubber ____________me.

Shanghai is the city ______ the 2010 world Expo is held. –So it is a city____ most of us want to vist this summer.