Students ____ book up to four books at a time. a) must b) are allowed to c) can't We ____ chew gum in class. a) should b) may c) mustn't Don't forget to take your umbrella. It ____ rain later. a) might b) can c) could Remember, you're in a library! You ____ speak quietly. a) must b) have to c) are allowed to You ____ be hungry! You've just eaten lunch! a) have to b) can't c) must Don't ride so fast! You ____ have an accident! a) have to b) may c) are allowed to Your dog is jumping and running all the time. It ____ be happy. a) can't b) must c) could Doctors say we ____ eat fruit and vegetables to have healthy-looking skin. a) should b) have to c) need to I ____ take my phone on school trips. a) must b) am not allowed to c) have to Do you ____ wear uniform at school? a) need to b) have to c) may

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