单项选择题
Psychologists have errantly mounted an offensive against what they describe as nastiness to ward students by educators（）
A. arbitrariness B. unpleasantness C. severity D. aloofness
单项选择题 Those old buildings were ______ to make room for a new shopping center.
单项选择题 AIDS is causing great public concern because the（）fatal disease hits primarily young people.
单项选择题 The survey showed that （）numbers of 15-year-olds were already smoking twenty cigarettes a week.
