---Please sit down and have a break. You have been working for three hours.---No, thank you. _____.
________________of the students who took part in the military training(军训) is 450.
--- Oh ! I’ve just broken a window. --- ______. I know you didn’t do it on purpose.
What’s the matter with you? There’sin your project!
—Why are you laughing secretly at me? —You lookin that odd hat.
—What about the protection? —Let’s keep the surfacedirt by putting a cover over it.