What (is/are) _____?
What are those? Those are dictionaries.
What (is/are) _____?
What is this? It's a cellphone.
This is __ cute umbrella! (0 - a - an)
This is A cute umbrella!
What are ______?
What are THESE? They're headphones.
_____ are my new embroidery works.
These
The teacher wants ___ answer for the math problem.
The teacher wants AN answer for the math problem.