4. Complétez avec l'un des auxiliaires modaux suivants et mettez le verbe à la bonne forme: CAN, MAY, MUST, CAN'T, MUSTN'T, COULD, SHOULD, COULDN'T. Lorsqu'il y a plusieurs réponses possibles, n'en mettez qu'une seule. 1-You (... open...) that door; it's forbidden. 2-The sky is cloudy; it (... rain...). 3-He was so anxious that he (... sit...) still. 4-1 (... go...) home again: I've forgotten my money! 5-You (... eat...) some fresh food: it's good for you! 6-You (... do...) your shopping now; the shops are closing soon. 7-She (... be...) ill I I've just seen her in town. 8-(... I... help...) you carry your suitcase, Madam? 1- 2- 3- 4- 5- 6- 7- 8-​