ⅰ.语法填空(根据句意填入适当的关系词) 1．(2015·安庆模拟)________ the city's public school system should be open to the children of migrant workers has become the focus of discussion. 答案 whether [whether “是否”，引导主语从句。句意：这座城市的公立学校是否对外来务工人员的孩子开放成为讨论的焦点。] 2．(2015·嘉兴模拟)________ leaves the room last ought to turn off the lights.
