84.His intelligence and experience will enable him to () the complicated situation.

28.The pressure () causes Americans to be energetic, but it also puts them under a constant emotional strains.

27.Had he worked hard, he () the exams.

26.The soldier was () of running away when the enemy attacked.

25.According to Papousek, the pleasure babies get in achieving something is a reflection of ().

24.The babies would “smile and bubble” at the lights because ().

23.In Papousek’s experiment babies make learned movements of the head in order to ().

22.Papousek noticed in his studies that a baby ().

21.According to the author, babies learn to do things which ().

20.Which of the following is the main idea of the passage? ().

19.Cats sleep much more than horses do partly because cats ().