题目

根据对话内容，从方框内选择恰当的句子,并将其字母标号填入对话相应的空白处，使对话完整，合乎情景。（有两个多余选项)Jack: Was the concert good?Sadie:【1】Jack: Why are you angry then?【2】Sadie: Well, after the concert I waited outside the theatre—in the rain. I wanted their autographs.Jack: Did you see them? Sadie:【3】Jack: Did they talk to you? Sadie: No, they didn’t. They didn’t wave. They didn’t smile. They didn’t say hello. 【4】They just jumped into a big, black car and then disappeared.Jack:【5】Sadie: Yes. But that下列说法正确的是（　　）A．丙炔分子中三个碳原子不可能位于同一直线上B．乙炔分子中碳碳间的三个共价键性质完全相同C．分子组成符合CnH2n-2的链烃一定是炔烃D．在所有符合通式CnH2n-2炔烃中，乙炔所含氢的质量分数最小