Three free tickets for the Expo will be given to ________ comes first in the competition.
The good thing about children is that they _______ very easily to new environments.
Titan is believed to be the only body in _____ solar system other than the Earth with liquid on ______ surface.
To be successful, you must be smart, confident, and, ______ honest.
I get the bicycle for _____.My friend gave it to me when she bought a new one.
It’s really difficult to ______ what he is trying to express.