Once a year , people take part in “ ____
问题:
Once a year , people take part in “ ______ Lights ” activity to help save energy .
A.Show Off
B.Turn Off
C.Take Off
D.Put Off
Once a year , people take part in “ ______ Lights ” activity to help save energy .
A.Show Off
B.Turn Off
C.Take Off
D.Put Off