--Don't forget to turn off the light if you're the last one to leave.--__________.

问题描述:

--Don't forget to turn off the light if you're the last one to leave.--__________.
选项:A .I will B.I won't.
为什么选B?
做这种题的方法是什么?(我们老师说什么要把前面的词去掉,没听懂)
什么时候用A回答?

前一句是否定式祈使句,所以选B.I won't 是“I won't forget to turn off the light if I am the last one to leave"的省略.
当前面是肯定式祈使句时才用A 来回答.
希望你能理解.
祝学习进步,更上一层楼!