When I saw him, he _________ (wait) for the bus.
What _______ you ________ (do) at that time last week?
Look, what ______ they _______(do) in the park?
I saw him ________(play) in the park just now.
The cat ________(lie) under the desk when you passed.
While the boy _________(watch) TV, his cat jumped down from the table.
My friend __________(go) to the museum if it ______(be) fine tomorrow.
Did you find it difficult _________(do) it?
Liu Xiang _______(win) the gold medal at the 2004 Olympics.
Beijing _________ (make) host to the 2008 Olympics