I hear you have got a ticket ____ the Opening Ceremony of the Beijing Olympics. — Yes, I got it ____ my uncle. [ ]

Great changes have taken place since then in the primary school _______I am studying.

I have been to London. I ____________ there last month.

Scientists say it may be five or six years _____ it is possible to test this medicine to human patients.

My brother doesn’t like playing _____ piano. He likes playing _____ chess.