How many times have you sung that song?

He has read thousands of books.

What floor is the library on?

How many times have you been to Japan?

He likes to take a walk in the park at dusk.

What is this object?

He is conducting research on celestial bodies.

This antibody strengthens the defense against the virus.

We should respect the opinion of the whole.

He exercises every day to maintain the health of his body.