MUST, The police said we can't cross this line. We _____ wait behind., SHOULD, The doctor said I _______ quit smoking., MIGHT, John doesn't answer the phone. He ____ me sleeping or listening to music., TO, Sorry, I can't go. I have _____ finish my homework., DON'T, The club is free for members. They ____ have to pay., CAN'T, Can you speak slowly, please? I ______ understand you., CAN, Do I have to bring my tennis racket or _____ I borrow one?.

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