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¡¡¡¡¡¾2015н®ÎÚ³ľÆë¡¿27.-Must I come up with the solution to the science project today?
¡¡¡¡-No, you ____. But you must make it ___ 5 o’clock tomorrow afternoon.
¡¡¡¡A.mustn’t ; at B.can’t ;before C.don’t have to;by D.needn’t ;in

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