The lights is on．When you leave，please _____．
OK，I won't forget ____it．（ ）
| A． |
turn it off； to do |
| B． |
turn off it； doing |
| C． |
turn on it； to do |
The lights is on．When you leave，please _____．
OK，I won't forget ____it．（ ）
| A． |
turn it off； to do |
| B． |
turn off it； doing |
| C． |
turn on it； to do |
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