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I-Instructions: Read each sentence carefully. Complete the statement using the appropriate modal verb and circle the letter of your choice. 1. She be his mum. She 's too young. a, mustn't b. could c. can't d. must 2.1 _ already read when I was two. a. can b. must c. have d. could 3. You leave before the clock strikes twelve. a. must b. have C. can d. could 4.1_ to study tonight. a. can b. have c. could d.can't 5. My darling - be home by now. Where can she be? a. have to b. would c. should d. could try this new diet. 6. If you are interested in losing weight, you a. mustn't b. could c. can't d. must 7. Children a. can c. have be accompanied by an adult at the zoo. b. must d. could be serious! 8. You've never heard of Britney Spears? You a. mustn't b. haven't c. can't d. couldn't 9.1_ to study tonight. a. can b. have c. could d.can't 10. You a. mustn't C. can't let him hear about the party tomorrow. It's a surprise! b. haven't d. couldn't​