1) When I was younger, I ....ride a bicycle without training wheels. a) can b) could 2) She... speak three languages fluently when she was a teenager. a) could b) can 3) They... climb to the top of the mountain last year. a) could b) can 4) I ... solve difficult math problems when I was in high school. a) can b) could 5) He ... play the piano beautifully when he was a child. a) can b) could 6) We ... swim across the river when we were stronger. a) could b) can 7) She ... run a marathon in under three hours when she was 25 years old. a) can b) could 8) They ... lift heavy weights without any difficulty in the past. a) could b) can 9) I ... speak two languages fluently. a) can b) could 10) I ... paint realistic portraits when I was studying art. a) can b) could 11) He ... perform amazing card tricks when he was a magician a) can b) could 12) She ... play the piano beautifully. a) can b) could 13) They ... solve complex equations. a) can b) could 14) He... run a mile in under six minutes. a) can b) could 15) We ... swim across the pool. a) can b) could 16) The cat ... climb up tall trees. a) can b) could 17) He ... paint stunning landscapes. a) can b) could 18) She ... bake delicious cakes. a) can b) could 19) They ... dance gracefully. a) can b) could 20) I ... play the guitar with skill. a) could b) can

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