阅读下面的对话，按照句子结构的语法性和上下文连贯的要求，在空格处使用合适的情态动词填空。The play _ begin at any moment, I said.It _ have begun already, Susan answered.(I hurried to the ticket office.)_ I have two tickets please? I asked.Im sorry, weve sold out, the girl said.What a pity! Susan exclaimed (大叫).(Just then, a man hurried to the ticket office.)_ I return these two tickets? he asked.Certainly, the girl said.(I went back to the ticket office at once.)_ I have those two tickets please? I asked.Certainly, the girl said, but theyre for next Wednesdays performance. Do you still want them?I _ as well have them, I said sadly.
