_______ Lee swim? - Yes, he can., could, can, couldn't, can't, _______ you ski last year? - No, I _________., could, can, couldn't, can't, _______ your brother ride a bike? - No, he_________. He's only 3., could, can, couldn't, can't, _______ you understand the lesson yesterday? - Yes, I _________. , Could, can, couldn't, can't, could, _______ you do this crossword puzzle? - No, we can't. It's really difficult, could, can, couldn't, can't, Can you see the board, Tim? - No, I _______., could, can, couldn't, can't, ___________ you understand English last year? - Yes, I _______., Could, can, couldn't, can't, could.

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