It is the interaction between people, rather than the events __ occur in their lives, __ is the main focus of social psychology

Praise is like sunlight to the human spirit； without _____we cannot flowerand grow

been living in the United Statesfor twenty years, but seldom_______ so lonely as now.

.—Is Jack your brother— . He is my friend.

ationwide smog should serve as a reminder to all, indicating a high time that we____ on what we’ve done to the environment.