1) We ____ know the answer today a) Must b) Shouldn't c) Should d) Mustn't e) Can f) Can't 2) We ____ drive on the right side of the road a) Must b) Shouldn't c) Should d) Mustn't e) Can f) Can't 3) We ___ go on vacation today or tomorrow a) Must b) Shouldn't c) Should d) Mustn't e) Can f) Can't 4) You ____ clean every day. Once a week is enough. a) Must b) Mustn't c) Should d) Shouldn't e) Have to f) Don't have to 5) You ____ study well. a) Must b) Shouldn't c) Mustn't d) Can e) Should  f) Can't 6) He ____ go out for a walk today. His leg hurts. a) Mustn't b) Must c) Shouldn't d) Should e) Can't f) Can

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