二、单选(共15小题；每小题1分，满分15分)
21.—Would you like some more fried chicken?
— It would make me gain weight.
A. Why not ? B. Good idea. C. No, thanks. D. What for?
22.---I met your boss in the street this morning.
---Ah? You be joking. He flew to Europe yesterday !
A. must. B. should. C. could. D. might.
23. It was almost midnight when a fire in the neighborhood.
