Fill in the gaps, using MUST, NEED’T, HAVE TO, OUGHT TO, BE TO, SHOULD : 1) She’s crying . She_ be upset. 2) You _buy tickets beforehand. 3) Lilly _ come at 3. But she hasn’t come yet. 4) You _ be careful when you cross the street. 5) I_ return to the hotel because of the rain. 6) Tommy _ pump up the tires.