She devoted herself ________to her research and it earned her a good reputation in her field.

in a hopeless situation, ________ weshould keep a close eye on.

I’ll remind him_______ what he has promised to us so that he won’t forget it

One third of the country ___ covered with trees and the majority of citizens ___ Han people.

Rich and famous as he is, he lives in a ________ house in the village.[ ]