As middle school students, we _____ the
题型:选择题
问题:
As middle school students, we _____ the police to keep order.
A.are used to help
B.used to helping
C.used to help
D.used to be helped
As middle school students, we _____ the police to keep order.
A.are used to help
B.used to helping
C.used to help
D.used to be helped