题目

下列物质进行一氯取代反应后，只能生成四种沸点不同产物的是 A．(CH3)2CHCH2CH2CH3                                  B．(CH3CH2)2CHCH3 C．(CH3)2CHCH(CH3)2                        D．(CH3)3CCH2CH3 答案：B— Would you please tell me _________? — In half an hour. A. when the plane left      B. when the plane will leave  C. when will the plane leave