"Cette comptable cache des choses."
Translation:This accountant is hiding things.
When comptable is singular, it does not change form according to gender. Both "ce comptable" and "cette comptable" are accepted. If you are referring to a "type what you hear" exercise, you must type exactly what is given in the audio, and that is "cette comptable". From a written exercise, you may use either "ce comptable" or "cette comptable".