问题
选择题
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
答案
答案：B
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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
答案：B
