Choose the correct use of the infinitive or gerund to complete the dialogue.

     NCO Academy student: Good morning, Sir
    Sergeant Major: Why are you awake in uniform so early? Today is your day off. You can ___(sleep)___ until seven o’clock today. It’s worth ___(stay)___ in bed a little longer to recover from the exhausting week.
     NCO Academy student: I enjoy ___(learn)___ foreign languages, so I woke up early ___(study)___ English.
     Sergeant Major: I’m really proud of ___(see)___ you working so hard.