1.Mary isn't here.She ____ (go) to the shop.2.I ____ (buy) the book yesterday.
3.____ you ____ (stay) here till next week?
4.Have you seen the play ____ (show) in People's Theatre?
5.The ad for a new car is the best one that I have ever ____ (see).
6.What ____ you ___ (do) at that time last week?
7.look ,what ____ they ____ (do) in the park?
8.While the boy ____ (watch) TV ,his cat jumped down from the table.
9.Liu Xiang ____ (win) the gold medal at the 2004 Olympics.
10.When I saw him ,he ____ (wait) for the bus.