Sure, I can help you complete the question in Arabic without needing external sources.
Here are a few ways to complete the question, depending on what you want to ask:
A student... what does he study? طالب... ماذا يدرس؟
A student... what is he doing? طالب... ماذا يفعل؟
A student... where is he going? طالب... إلى أين يذهب؟
A student... is he diligent? طالب... هل هو مجتهد؟
Which of these, or another idea, were you thinking of?