Fill in the Blanks Unit 4Online version test for the unit by Marleny Chén 1 have doesn't mustn't don't to must to have must I work on weekends . She get up early . I go home . I take my children to school . You talk to strangers . 2 Must I make a decision right now ? It is now or neve r 3 mustn't mustn't must must They smoke inside the room . I visit my grandmother , she asked me to do so . We fight for a better world You be here until eight o'clock . 4 had have to have don't to I study for the exam Yesterday , I take a taxi You to pick me up at the estation . I can take the taxi .