According to some theories ________ from psychoanalysis, life is supposedly easier; and more pleasant when anxiety is overcome.
Scientists are convinced ______ the positive effect of laughter ______ physical and mental health.
In American there are more households with pets than ______ with children.
They are said to have developed a new ______ to teaching, which is said to improve classroom teaching greatly.
The first one ______ will get a beautiful gift.
Children, who grow up in a friendly family, are more ______ to get along wellwith others.