Choose the appropriate modal. 1) You _______ must/can drive carefully near the crossing. 2) The water _______ was able to/couldn't be cold. It has been very hot these days. 3) The elephants _______ mustn't/are not able to stand the mice. 4) My granny _______ could/mustn't speak several languages. 5) People _______ mustn't/are not able to litter in the city. 6) He was weak and everybody _______ had to/was able to beat him. 7) Can/Could _______ you hear a strange noise out there? 8) We _______ could/had to smell something burning. 9) The children _______ are able to/mustn't talk with their mouthful. 10) She is a perfect psychologist. She _______ was able to/had to persuade me to come.