Usage patterns
すらすら(と)話すto speak fluently, without hesitation
He spoke English fluently, without any hesitation.
すらすら(と)書くto write smoothly, without struggling
She finished writing the report smoothly, without any trouble.
すらすら(と)読むto read fluently, without stumbling
The child can already read books fluently.
すらすら(と)答えるto answer readily and without hesitation
He answered every question readily, without any hesitation.