It is widely accepted that your babies learn to do things because certain acts lead to_____.
32. According to the regulation, all _____ should be examined before boarding a plane.
33. Yan'an used to be a revolutionary _____ for the Red Army.
34. You’d better take more sun _____ . It is good to your health.
35. It’s reported in today’s newspaper that street _____ took place last midnight on the border of Israel and Palestine.
36. --- How did you enjoy the ball last night? --- Very much. The underlined word means _____.