Constructionoftherailwayshelpedtodevelopthenational_______ofTanzaniaandZambia.
A、economicIt________asashocktorealizethatIwasnotaloneintheroom.
Theterriblenoiseis______memad.
Takeit______.Itisnothingbutajoke.
Human behavior is mostly a product of learning ________ the behavior of animals dependsmainly on instinct.
A baby might show fear of an unfamiliar adult, _______ he is likely to smile and reach out to another infant.
