题目内容
–How can you save electricity?
–____________.
A.By switching the lights B.By switching the lights on
C.By switching the lights off D.By switching the lights down
C
|
题目内容
–How can you save electricity?
–____________.
A.By switching the lights B.By switching the lights on
C.By switching the lights off D.By switching the lights down
C
|