单项选择题
The association is（）to raising funds to help the blind.
A.conducted B.committed C.concentrated D.concerned
单项选择题 Since William had been seriously ill for several months, his parents were worried about（）to return to school full-time.
单项选择题 It（）as a shock to realize that I was not alone in the room.
单项选择题 （）so many people in the United States been out of work as today.
