问题详情：
47. The school regulation says: no student _________use their call-phones at school.
48. No one knows how April Fool’s Day began but it was thought _______________ (begin) in France.
49. The little boy ______________ (seat) in bed and listened to light music.
50. They didn’t fight, but stood there g___________ at each other.
51. The a_______________ broadcast the bad news about the terrible accident.
【回答】
47. shall
48. to have begun
49. was seated
50. glaring
51. announcer
知识点：语法填空
题型：未分类
