Completa las siguientes frases con must, must n't, have to, don´t have to ó doesn't have to 1?
Completa las siguientes frases con must, must n't, have to, don´t have to ó doesn't have to 1. My mother ________ forget to turn the lights off before she goes to bed. 2. the boys _______play the game in the afternoon. 3. those students ______ have a visa if they want to travel to the U. S. A.