题目

There was a woman in Detroit, who has two sons. She was _______ about them, especially the younger one, Ben, _______ he was not doing well in school. Boys in his class _______ him because he seemed so _______.The mother _______ that she would, herself, have to get her sons to do better in school.She_______ them to go to the Detroit Public Library to read a _______ a week and do a report about it for her.One day, in Ben’s _______, the teacher held up a rock and asked if anyone knew it. Ben _______ up his hand and the teacher let him ________. “Why did Ben raise his hand?” they wondered. HWe Chinese students usually have 8 weeks ______ in the summer holiday.A. during B. of C. on D. off