UNIT 1 TO UNIT 3I. HÃY CHỌN MỘT TỪ CÓ PHẦN GẠCH DƯỚI ĐƯỢC PHÁT ÂM KHÁC...

33. Since the new regulations _________ in their school last month, there has been a remarkable

decrease in the number of problematic students.

A. came into force B. were put into being C. came true D. were put into force