In a sports team each player has a clearrole，and there arefew occasions members areconfused or uncertain of their roles

He ________ living in the country to the city

the new comer, has earned not only the trust ofher classmates but also ______ of her teachers.

It’s not easy to change habits，________ with awareness and self­control，it is possible

Geography is the study of the countries of the world and of such things ______ the land, seas, climate, towns, and population.