单项选择题
Men differ from animals ______ they can think and speak.
单项选择题 Nine is to three ______ three is to one.
单项选择题 Our association, which has consistently pressed for greater employment opportunities for the disabled, will publish ______ proposals in the near future.
单项选择题 Had Judy been more careful on the maths exam, she ______ much better results now.