Used to ask for someone's opinion or reaction after describing something.
“So, what do you think this strange thing could be?”
“I've described it as best I can — what do you think it is?”
In Task 8, since you're speaking to an imaginary listener, adding a question like 'what do you think?' makes your monologue sound like a real conversation, which examiners look for in tone and delivery. Use it after describing the object and offering your guess about its purpose, letting it signal a natural pause or transition.
Synonyms: what's your take, what's your guess, any idea what it is