queanhyeumoinguoi queanhyeumoinguoi

11-09-2021
English

contestada

He has been very interested in doing research on _______ since he was at high school.

a.biology b. biological c. biologist d. biologically

Respuesta :

jerex2006 jerex2006

11-09-2021

Answer:

biology

Explanation:

This is because research is made on a subject which should basically be a noun but since there's on article before the missing word therefore the noun biology suits best

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