You ______ touch that dog. It looks dangerous. , should, could, mustn't, must, The bus ______ be here by now. That's what the schedule says. , can't, could, mustn't, should, When I was six, I ______ play the violin but I haven't practised since then so I can't play anymore. , could, must, mustn't, should, She ______ study harder if she wants to pass the exam. , mustn't, must, should, can't, I'm tired. I ______ go to bed early tonight. , mustn't, can't, must, could, You've just had a huge breakfast. You ______ be hungry anymore. , could, must, mustn't, can't, Passengers ______ speak to the driver when he is on duty. , mustn't, should, can't, could, Ask Henry. He ______ know the answer but I'm not sure. , must, could, mustn't, should, When I was younger I ______ climb to the top of the mountain without being out of breath. , must, mustn't, could, should, The company boss ______ be extremely rich if he owns several sports cars. , mustn't, should, can't, must, That ______ be John. He said he was going to travel to Australia. , can't, could, must, should, When I was younger, I ______ sing very well. , must, could, mustn't, should, I think you ______ relax more. You have been working too much lately. , can, can't, should, could, You ______ go in without a ticket. All seats are reserved. , could, must, should, can't, All passengers ______ put on their seatbelts during take-off and landing. , must, mustn't, should, can, At what age ______ you get a driving licence in your country?, can't, can, could, must, Mum, ______ you pass me the sugar, please?, must, mustn't, should, could, If you want to be a teacher, you ______ attend a teacher's training college. , must, mustn't, should, can, You ______ park in a no-parking area. It's forbidden. , mustn't, should, can, can't, You ______ go home now. You needn't writing those emails. They can wait until tomorrow. , can't, can, couldn't, had to.

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