I am a student. I usually _______at 4:30 p.m..

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

Have you seen a dictionary?— There’s one on the teacher’s desk. Is it _____?

_____ are those vegetables? —Two yuan a kilo.[ ]

Mrs White, why are you standing here?—I’m waiting for my son. He ___________ back from school.