2015È«¹úÖп¼Ó¢ÓïÕæÌâ֪ʶµã½âÎö--Çé̬¶¯´Ê
¡¡¡¡¡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