单项选择题
A．a letter to the editor B．a comment on a novel C．an introduction to a dictionary D．a news-report in the newspaper
A．bill B．accounts C．fees D．fare
A．individual with identical brains seldom test at same level B．an individual"s intelligence is determined only by his environment C．lack of opportunity blocks the growth of intelligence D．changes of environment produce changes in the structure of the brain