My brother __ speak three languages fluently., Can, must, should, You __ wear a helmet when riding a motorcycle., could, must, might, Students __ submit their assignments before Friday., can, have to, could, You look tired. You __ get enough rest., should, mustn't, cant't, We __ bring an umbrella because it might rain later., must't, can't, could, You __ park your car here. It is not allowed., should, mustn't, can, Sarah __ play the piano when she was five years old., could, must, has to, You __ be quiet during the examination., could, can, must, I __ finish my homework before watching television., can, have to, might, You __ ask your teacher if you do not understand., mustn't, should, can't, My father __ drive a car very well., can, should, mustn't, We __ protect the environment for future generations., could, should, can't, You __ eat too much junk food because it is unhealthy., can, shouldn't, have to, They __ visit the museum if they have free time., could, must, have to, You __ follow the school rules at all times., must, might, can, I __ help you with your project tomorrow., mustn't, have to, can, We __ bring our own food because the restaurant is closed., could, shuldn't, have to, You __ be careful when exploring a cave., can, should, might, He __ finish the task today because it is urgent., has to, could, can, You __ use your phone during the test., should, could, mustn't, You __ bring a jacket because the weather is very cold., should, can, mustn't, Visitors __ follow the safety instructions in the museum., have to, could, can, My sister __ swim very well because she joined a swimming club., must, should, can, You __ be late for the meeting because everyone is waiting for you., could, shouldn't, can, We __ recycle plastic bottles to reduce pollution., mustn't, should, can't, Amir __ complete his project today because the deadline is tomorrow., has to, could, might, You __ bring a map when exploring a new place., mustn't, can't, could, Students __ use dictionaries during the activity if they need help., must, can, have to, You __ touch the equipment without permission. It is dangerous., should, could't, mustn't, We __ respect other people’s opinions during a discussion., can't, might, should

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