1) You ... be quiet in the library. a) can b) must 2) We ... read books in the library. a) can b) must 3) My sister ... play the piano really well. a) can b) must 4) Children ... go to school. a) can b) must 5) Students ... listen to the teacher at the lesson. a) can b) must 6) You ... see wild animals in the zoo. a) can b) must 7) We ... brush our teeth every day. a) can b) must 8) We ... wash our hands before lunch. a) can b) must 9) You ... ride a bike in the park. a) can b) must 10) You ... play computer games after you do your homework. a) can b) must 11) We ... save water. a) can b) must 12) We ... take care of our pets. a) can b) must 13) He ... speak French. a) can b) must 14) We ... eat a lot of fruit and vegetables. They are good for us. a) can b) must

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