The man _________ was a friends of mine.

You look unhappy, what’s happening, my son? —I’m wondering how long it’ll be________ we come to China again.

Having been told ________ where he lived, I had no difficulty in finding Peter’s address.

When will the World Exposition (世博会) begin? —The Expo will beginMay 1, 2010.[ ]

I ________ my hometown for a long time. I really miss it!