根据所学课文内容填空(每空0.5分，共计7分)

I am ___1__ of my sister but she has one serious ____2___. She can be really __3__. Although she didn’t know the best way of getting to places, she insisted that she __4___ the trip properly. Now I know that the proper way is always her way. I kept asking her, “When are we leaving and when are we ___5___ back?” I asked her whether she had looked at a map yet. Of course she hadn’t; my sister doesn’t care ___6__ details. So I told her that the   7  _ of the Mekong is in Qinghai Province. She gave me a ___8__ look-- the kind that said she would not change her mind. When I told her that our journey would begin    9  an altitude of more than 5,000 metres, she seemed to be excited about it. When I told her the air would be hard to ___10__ and it would be very cold, she said it would be an interesting ___11__. I know my sister well. ___12___ she has made up her __13__, nothing can change it. Finally, I had to give    14  .

某市环保局应当地居民的举报对排放烟尘超过国家标准的某化工厂作出了罚款4万元的行政处罚，并责令限期治理。化工厂对环保局的行政处罚不服，向法院提起行政诉讼。诉讼期间，原告找到被告要求协商解决，被告同意遂变更了原行政处罚决定，对原告征收2倍的排污费。原告向人民法院申请撤诉。据此回答以下题。

被告在一审期间改变原具体行政行为，法院应否准许

A．不应当准许，被告改变处罚决定属于违法行使职权

B．不应当准许，原告一旦提起行政诉讼，具体行政行为即系属于诉讼

C．应准许，因为法律并未禁止被告在一审期间改变原具体行政行为

D．被告在一审期间改变原具体行政行为无须经法院批准