The light is still on. Why not ______?
A. turn it on
B. turn it off
C. turn on it
D. turn off it
正确答案：B
17．答案为B灯还亮着为什么不关掉?turnon“开灯”turnoff“关灯”不定代词it一般放在词组中间
ThelightisstillonWhynot______?AturnitonBturni
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