1) They ___________ study tomorrow. a) Cuold  b) Could c) Could'nt 2) Luis __________ go to school. a) couldn't b) cuoldn't c) couldno't 3) _________ she eat ceviche yesterday? a) cuold not b) could not c) could´t 4) Her father _________ cook well. a) can b) could c) cuold 5) __________ his brother run very fast? a) could n´t b) could c) cuoldn´t 6) Your sister ___________ concentrate at school. a) couldn't b) cuold not c) cuold' 7) _________ he work in the company? a) could not b) could´t c) cuold 8) _________ you speak English when you were little? a) could b) cuold not c) can 9) My brother ___________ play the piano. a) cuold b) couldn´t c) could n´t 10) I ___________ do the exam fast. a) culd b) could c) culdn't

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