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Must, mustn't and have to
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You . . . wear a helmet when you are go-karting.
have to
Oops!
Okay!
You . . . bring some drink and food. If you do, you won't be hungry.
have to
Oops!
Okay!
You . . . leave the track because someone could get hurt
mustn't
Oops!
Okay!
You . . . wear skates and hit the puck into the goal
must
Oops!
Okay!
I . . . get good score for this exam.
must
Oops!
Okay!
You . . . pot the balls into the pockets.
have to
Oops!
Okay!
I . . . exercise regularly to stay healthy and fit.
must
Oops!
Okay!
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