Finish the following dialogue with one word each:
25-Mother : What are you .(1)………………………. Ahmed?
Ahmed : I'm doing my internet search.
Mother : What is .(2)………………………. about?
Ahmed : It's about an .(3)………………………. scientist.
Mother : What scientist did you .(4)………………………. ?
Ahmed : I chose Dr Farouk El- Baz