A giant ground sloth ___ swim and it ___ fly.
couldn't / couldn't
A sabre-toothed squirrel ___ fly, but it ___ climb trees.
couldn't / could
A wooly mammoth ___ fly and it ___ climb trees.
couldn't / couldn't
A dodo ___ swim, but it ___ run.
couldn't / could
A dodo ___ swim, and it ___ climb trees.
couldn't / couldn't
A prehistoric armadillo ___ swim, but it ___ climb trees.
could / couldn't
A wooly mammoth ___ walk and it ___ run.
could / could
A sabre-toothed tiger ___ sing and it ___ fly.
couldn't / couldn't
A sabre-toothed squirrel ___ jump, and it ___ climb trees.
could / could
A sabre-toothed tiger ___ run, but it ___ fly.
could / couldn't