. CHOOSE THE WORD OR PHRASE THAT BEST FITS THE SENTENCE

25) - KIEM TRA 1TIET 12NC SO 2
KIEM TRA 1TIET 12NC SO 2
25). Choose the word or phrase that best fits the sentence:" Phone me before ten; . . . . I'll be too busy to talk to you."A). whether B). otherwise C). unless D). if