1) ______ you open the window?  a) Could  b) Must  2) You ______ drive more carefully. a) Can b) Should 3) He ______ run very fast.  a) Can b) Must 4) They ______ eat much healthier.  a) Could b) Can 5) You ______ eat junk food every day. a) Can't b) Shouldn't 6) You ______ drive without a license.  a) Mustn't b) Can 7) You _____ show passport in the airport. a) Can't b) Must 8) You look tired, you ______ take a break. a) Should b) Must 9) They ________ help you with your homework. a) Can't b) Couldn't 10) You _____ do more exercise. a) Must b) Should

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